142 Sentences With "seminal fluid" | Random Sentence Generator

The last step of mating which is sperm and seminal fluid release?

"We used rams because rats and rabbits don't have seminal fluid like humans," Amobi says.

We know now, as we accumulate experience, it can be seen in the seminal fluid.

That spermless semen, which may also be referred to as seminal fluid, is still of interest to forensic scientists.

It can only be spread by contact with blood, semen, pre-seminal fluid, rectal fluids, vaginal fluids, and breast milk.

During a vasectomy, the tubes that carry sperm are closed or blocked, and sperm can no longer enter the seminal fluid.

Also inside the bag were several "napkins which were wet and appeared to be covered in seminal fluid," the affidavit says.

It can sometimes seem like their entire existence is motivated by a need to shoot sperm and seminal fluid from their genitalia.

The case suggests that the virus penetrates the prostate, seminal vesicles or bulbourethral glands, which together produce pre-ejaculate and seminal fluid.

A walnut-shaped gland under the bladder, the prostate secretes seminal fluid, which provides nutrition for and allows the transport of sperm.

What's more, you can take a "live video" of your sperm in action, like a selfie of seminal fluid, which is great because . . .

The muscular aspects are what help the prostate propel the seminal fluid into the urethra, to mix with the spermies, to go into your hair.

Sperm donations from men with some viruses, including H.I.V., can be "washed" by removing the seminal fluid, since the virus does not penetrate the sperm.

The treatment, called Vasalgel, consists of an injection into the vas deferens, the duct that transports sperm to the urethra where it mixes with seminal fluid.

This will allow you to gain confidence in your own pattern, fertile time, and understanding of cervical mucus before adding in the complication of understanding seminal fluid.

But a new injectable gel that blocks sperm inside the body, preventing them from leaving while allowing seminal fluid to pass through, has proved effective in trials using monkeys.

Dafna Michaelson Jenet introduced a bill in January to expand the definition of sexual contact to include the knowing ejaculation of seminal fluid on any part of a victim.

Next, the book reproduces the odd and strikingly juicy piece unique "Paysage Fautif" (1946) from the Museum of Modern Art in Toyama, Japan, which consists of seminal fluid on black satin.

Since his first deployment in March, following intense training, Billie and his handler have completed 18 searches and the police dog detected the presence of seminal fluid at eight of those scenes.

According to the court records, Cline denied using his own sperm more than 30 years ago, telling detectives then the seminal fluid he'd used with his patients came from dental and medical students.

It's partially made out of muscular tissue and partially made out of glandular tissue; what it secretes is seminal fluid, which mixes with the spermies to make the stuff that goes in your hair.

Another possibility for the biological discrepancy is that male sexual organs need to release seminal fluid, which may also explain why a time of hormonal flux like puberty could lead to more frequent occurrences.

We hope to help improve that process by understanding which seminal fluid proteins from male honey bees (drones) cause specific post-mating changes in queens, such as triggering egg-laying or contributing to queen bees' longevity.

In that meta-analysis of 61 studies worldwide, researchers led by Elisabeth Carlsen, a Danish reproductive biologist, found a trend toward decreasing sperm count and volume of seminal fluid over a 50-year period ending in 1991.

Currently, insured women can get their tubes tied with no out-of-pocket costs, but insurers are not required to cover the male equivalent of sterilization (which blocks sperm from getting to the seminal fluid) without cost-sharing.

Their research, led by Shir Zer-Krispil and published Thursday in Current Biology, honed in on a particular neuropeptide called corazonin (CRZ) that plays a role in activating the release of sperm and seminal fluid in male fruit flies.

There was some tugging, there was a nasty, burning hair smell from the cauterization of my vas deferens—the tubes through which sperm travels from the testicles to be mixed with seminal fluid in the prostate—and that was it.

This means sperm are very dependent on external sources of antioxidants, including vitamin C, vitamin E, beta carotene, zinc, selenium, folic acid, lycopene and coenzyme Q-10, which are found normally in the seminal fluid and help prevent damage to sperm cells.

In 1677, the Dutch draper and amateur scientist Antony van Leeuwenhoek collected his semen immediately after having sex with his wife, examined it under a microscope of his own creation and saw millions of wriggling, tiny "animalcules" swimming in the seminal fluid.

Suddenly, in the decades following approval of the test known as the PSA, for prostate-specific antigen, the number of men receiving a diagnosis of prostate cancer skyrocketed, along with the number undergoing biopsies of this walnut-size gland between the bladder and penis that produces the seminal fluid to nourish sperm.

Also, paraplegics may ejaculate seminal fluid but not experience the sensation of orgasm.

FPP is produced in the prostate gland as a component of the seminal fluid. FPP comes into contact with the spermatozoa during ejaculation, as the sperm and seminal fluid mix. High levels of active FPP prevent capacitation. After ejaculation, the concentration of FPP drops in the female reproductive tract.

In organisms, sexual selection extends past differential reproduction to affect sperm composition, sperm competition, and ejaculate size. Males of C. lectularius allocate 12% of their sperm and 19% of their seminal fluid per mating. Due to these findings, Reinhard et al. proposed that multiple mating is limited by seminal fluid and not sperm.

The cauxin found in seminal fluid is produced by epidydimal cells. The concentration in seminal fluid is much lower than its concentration of urine. The role of cauxin as an esterase allows it to hydrolyze specific monoacylglycerols, suggesting that it is involved in lipid transfer and metabolism. It is also theorized to play a role in fertilization.

Spermatozoa, in this case human, are a primary component in normal semen, and the agents of fertilization of female ova. Semen, also known as seminal fluid, is an organic fluid created to contain spermatozoa. It is secreted by the gonads (sexual glands) and other sexual organs of male or hermaphroditic animals and can fertilize the female ovum. In humans, seminal fluid contains several components besides spermatozoa: proteolytic and other enzymes as well as fructose are elements of seminal fluid which promote the survival of spermatozoa, and provide a medium through which they can move or "swim".

There is tentative evidence for exposure to partner's semen as prevention for pre-eclampsia, largely due to the absorption of several immune modulating factors present in seminal fluid.

In such cases, specimens that show either sperm or specific enzymes that are unique to seminal fluid (enzymes prostatic acid phosphates or acid phosphatase) can be used to prove sexual contact.

Systematic studies of prostaglandins began in 1930, when Kurzrock and Lieb found that human seminal fluid caused either stimulation or relaxation of strips of isolated human uterus. They noted the curious finding that uteri from patients who had gone through successful pregnancies responded to the fluid with relaxation, while uteri from sterile women responded with contraction upon addition of this seminal fluid. The name prostaglandin derives from the prostate gland, chosen when prostaglandin was first isolated from seminal fluid in 1935 by the Swedish physiologist Ulf von Euler, and independently by the Irish-English physiologist Maurice Walter Goldblatt (1895–1967). Prostaglandins were believed to be part of the prostatic secretions, and eventually were discovered to be produced by the seminal vesicles.

Perineum pressing results in an ejaculation which is purposefully held back by pressing on either the perineum or the urethra to force the seminal fluid to remain inside. In such a scenario, the seminal fluid stays inside the body and goes to the bladder. Some people do this to avoid making a mess by keeping all the semen inside.65+ --Gateway to Sexual Adventure: For Women and Men, Herb Hirata - 2012 As a medical condition, it is called retrograde ejaculation.

However, males seeking mates have different preferences depending on whether they are unpaired or paired. Paired males benefit from high female fidelity, while unpaired males benefit from low female fidelity in order to increase their mating frequencies. Toxicity of seminal fluid: Females benefit from low seminal fluid toxicity, while males benefit from a high toxicity level as it increases their competitive edge. Female fecundity: Males benefit from a high female fecundity as it means that females can produce more offspring and have a higher potential for reproduction.

Maynard Smith has also written extensively on the "seminal fluid swapping theory" logistic application of the assortment of alleles as a more accurate synthetic depiction of the Hardy–Weinberg principle in cases of severely interbreeding populations.

After measuring ejaculate volume, mating rate and estimating sperm density, Reinhardt et al. showed that mating could be limited by seminal fluid. Despite these advances, the cost difference between ejaculate-dose dependence and mating frequency dependence have not been explored.

Males of some species use bodily fluids, such as seminal fluid from their ejaculate, to aid in the coercion of females. Seminal fluid in males of Drosophila melanogaster may contain chemicals that increase the amount of time it takes for females to remate, decrease the length of successive matings, or keep her from remating at all. The less a female mates with other males after copulation with a male, the more likely it is for him to ensure his paternity. These chemicals may also serve to increase the female's reproductive success, but at the cost of decreased longevity and immune response.

During mating, the female uses her gynosome to extract sperm and nutrient-filled seminal fluid from the male. A single mating session can last from 40 to 70 hours. The reversal of sex organs may be explained by the lack of nutrients in the cave environment, which makes it evolutionarily useful for the female to extract nutrients from the male. Female Neotrogla drain males of seminal fluid even when they are too young to reproduce, giving weight to this theory, according to entomologist Kazunori Yoshizawa who co-authored the first study of the insects' mating behavior.

Amos has been sexually abusing his daughter, Gillian, since she was a young child. The reader comes to understand that Amos has continued to abuse her, and it is likely that the seminal fluid found on Gillian's thigh is his, not Jack's.

On July 19, 2013, Suffolk County District Attorney Daniel F. Conley, Massachusetts Attorney General Martha Coakley, and Boston Police Commissioner Edward F. Davis announced the DNA test results proving that DeSalvo was the source of seminal fluid recovered at the scene of Sullivan's 1964 murder.

Esmail, S. (2010). HECOL 211 Human Sexuality Lecture Manual 2010. Department of Human Ecology, University of Alberta, Edmonton, AB. Seminal fluid continues down the ejaculatory duct into the prostate gland, where an alkaline prostatic fluid is added. This addition provides the texture and odor associated with semen.

Females may benefit from absorbing seminal fluid. Such benefits include male insects transferring nutrients to females via their ejaculate; in both humans and bovines, the fluid has antiviral and antibacterial properties; and useful bacteria such as Lactobacillus have been detected in fluid transferred from birds and mammals.

Collecting Chinook salmon milt at a USFWS hatchery Milt is the seminal fluid of fish, mollusks, and certain other water-dwelling animals which reproduce by spraying this fluid, which contains the sperm, onto roe (fish eggs). It can also refer to the sperm sacs or testes that contain the semen.

138 Except for the Fem-Cap, it also leaves exposed all the vaginal wall so that the hormones, etc. in the seminal fluid of the man can be better absorbed by the woman.Stopes pp.72-3, 163, 208 The condom doesn't allow any absorption and the diaphragm exposes less area.

In rare circumstances, humans can develop an allergy to semen, called human seminal plasma sensitivity. It appears as a typical localized or systemic allergic response upon contact with seminal fluid. There is no one protein in semen responsible for the reaction. Symptoms can appear after first intercourse or after subsequent intercourse.

Workflow of the differential lysis of a sample of sexual assault evidence is shown. All steps of the stepwise DNA-extraction process are described in detail. First of all human proteins, e.g. human semenogelin antigen, can be optional isolated and immunologically analyzed to quick-check for the presence of human seminal fluid.

The human ejaculate is mostly composed of water, 96 to 98% of semen is water. One way of ensuring that a man produces more ejaculate is to drink more liquids. Men also produce more seminal fluid after lengthy sexual stimulation and arousal. Reducing the frequency of sex and masturbation helps increase semen volume.

The secretory endpieces of these glands are lined with simple columnar epithelium; the main ducts are lined with stratified columnar epithelium. These glands do not occur in carnivores, but are present in some form in horses, ruminants and swine. Seminal fluid, the product of this gland, serves as a vehicle for the transport of spermatozoa.

The egg advances to come in contact with the seminal fluid. Then it passes along the common duct that receives a granular yellowish fluid that ends up surrounding the egg. The egg then passes into the ootype. By a vermicular moulding process, the yolk is arranged around the egg which begins take its form.

During this phase, the male urethral sphincter contracts (so as to prevent urine from mixing with semen, and to guard against retrograde ejaculation) and muscles at the base of the penis begin a steady rhythmic contraction. Males may start to secrete seminal fluid or pre- ejaculatory fluid and the testicles rise closer to the body.

Acid phosphatase is found in prostatic secretions and activity decreases with time and is usually absent after 24 hours. Prostate-specific antigen (PSA) may be detected within a 48-hour period. The seminal fluid of vasectomized men also contains a significant PSA level. Nonmotile sperm may be detected even beyond 72 hours after intercourse depending on staining techniques.

This cost of mating in D. melanogaster females is not due to receipt of sperm but is instead mediated by accessory gland proteins (Acps). Acps are found in male seminal fluid. The toxic effects of Acps on females may have evolved as a side effect of the other functions of Acps (e.g. male-male competition or increased egg production).

Nothing is known of the life history of this species. In related species, the male secretes sperm from pores on the coxae of the second legs into coxal sacs on the post-gonopodal legs. The secretions from the coxal sacs then form the seminal fluid into a spermatophore which is then transferred to the cyphopods of the female during mating.

Although a few groups are primarily terrestrial, rhacophorids are predominantly treefrogs which are arboreal. Mating frogs, while in amplexus, hold on to a branch, and beat their legs to form a foam. The eggs are laid in the foam and covered with seminal fluid before the foam hardens into a protective casing. In some species, this is done in a large group.

Males vary in their reproductive success but do not tend to show reproductive skew within a year. However, over several years, skew becomes strong due to the repeated success of particular males.Rossiter, S. 2006. After mating, seminal fluid coagulates in the female’s vulva to form a plug, which probably functions either to prevent subsequent matings by other males,Fenton, M. 1994.

Explanation on Retrograde ejaculation MedlinePlus. Retrieved on 2010-03-02 Another underlying cause for this phenomenon may be ejaculatory duct obstruction. During a male orgasm, sperm are released from the epididymis and travel via small tubes called the vas deferens. The sperm mix with seminal fluid in the seminal vesicles, prostate fluid from the prostate gland, and lubricants from the bulbourethral gland.

Is secreted from seminal vesicles to the seminal fluid. A number of alternatively spliced transcript variants have been observed at this locus, but the full- length nature of only two, each encoding the same protein, has been determined. During the passage of the sperm through the cervix, glycodelin S is de-glycosylated and dissociates from the sperm, allowing the sperm to mature.

In spite of his scientific background, Spallanzani endorsed preformationism, an idea that organisms develop from their own miniature selves; e.g. animals from minute animals, animalcules. In 1784, he performed filtration experiment in which he successfully separated seminal fluid of frogs – a liquid portion and a gelatinous animalcule (spermatozoa) portion. But then he assumed that it was the liquid part which could induce fertilisation.

The seminal vesicles secrete a significant proportion of the fluid that ultimately becomes semen. Fluid is secreted from the ejaculatory ducts of the vesicles into the vas deferens, where it becomes part of semen. This then passes through the urethra, where it is ejaculated during a male sexual response. About 70-85% of the seminal fluid in humans originates from the seminal vesicles.

Acp genes have been found in a variety of species and genera. Acps have been described as displaying a conservation function because they reserve protein biochemical classes within the seminal fluid. Drosophila hibisci use mating plugs rather than traumatic insemination. The mating plugs of Drosophila hibisci are gelatinous, hard composites that adhere to the uterus of the female in the event of copulation.

In many species, seminal fluid can be used as a sort of mating plug. Males of these species transfer their sperm at the beginning of copulation and use the rest of copulation to transfer substances that help build up the mating plugs. These plugs are effective in ensuring that the female does not mate with any other males and that the male's paternity is secured.

In all bed bug species except Primicimex cavernis, sperm are injected into the mesospermalege.Reinhardt, K. & Siva- Jothy, M. T. (2007) "Biology of the bed bugs (Cimicidae)," Annual Review of Entomology, 52, 351–374. The structure contains two main types of hemocyte, though their function is not yet fully understood. The first of these is phagocytic and may absorb seminal fluid, whereas the other may digest spermatozoa.

Females release between 1-5 eggs at a time. Males then go to the eggs and excrete a seminal fluid onto the egg. This process is repeated until around 2000 eggs have been distributed. During the egg stage, both parents alternate in the parental tasks, though males spend more time patrolling territory and females spend more time actively attending to the offspring by fanning the eggs.

In rare cases, people have been known to experience allergic reactions to seminal fluids, known as human seminal plasma hypersensitivity. Symptoms can be either localized or systemic, and may include itching, redness, swelling, or blisters within 30 minutes of contact. They may also include hives and even difficulty breathing. Treatment options for semen allergy include avoiding exposure to seminal fluid by use of condoms and attempting desensitization.

Surgery to correct benign prostatic hyperplasia may destroy these ducts resulting in retrograde ejaculation. Retrograde ejaculation empties the seminal fluid formed in the emission phase into the bladder of the male instead of expelling it through the urethra and out the tip of the penis. This results in a dry orgasm, where orgasm may still be experienced but without expulsion of semen from the ejaculatory ducts.

222-224 , with its structure being determined in 1911. In vitro assays, as well as in vivo animal models, are used in basic research to identify its potential biological properties. In humans, ergothioneine is acquired exclusively through the diet and accumulates in erythrocytes, bone marrow, liver, kidney, seminal fluid, and eyes. Ergothioneine requires a specific transporter, ETT, also known as OCTN1 (gene symbol SLC22A4), to enter cells.

The bag contained socks, a pair of blue jeans, and a pink sweatshirt, which were wet, muddy, and stained. Later analysis identified the stains as a mixture of blood and seminal fluid. Mingo also told the police about a pair of boxer shorts that he had found in the bathroom of the apartment. The shorts belonged to Mingo, but Jones had worn them on Friday night.

To determine conclusively that it was DeSalvo's, a court ordered the exhumation of his body in order to test his DNA directly. On July 19, 2013 Suffolk County DA Daniel F. Conley, Mass. Attorney General Martha Coakley and Boston Police Commissioner Edward F. Davis announced the DNA test results proving Albert Henry DeSalvo was the source of seminal fluid recovered at the scene of Sullivan's 1964 murder.

Cell and Tissue Research. 322:(2)43-52 Bromfield, J.,Schjenken, JE., Chin, PY,. Care, AS. Jasper, MJ.SA Robertson Maternal tract factors contribute to paternal seminal fluid impact on metabolic phenotype in offspring (2014) Cell and tissue research 322 (1), 43-52. JJ Bromfield, JE Schjenken, PY Chin, AS Care, MJ Jasper, SA Robertson Proceedings of the National Academy of Sciences 111 (6), 2200-2205.

The type 2 cystatin proteins are a class of cysteine proteinase inhibitors found in a variety of human fluids and secretions, where they appear to provide protective functions. The cystatin locus on chromosome 20 contains the majority of the type 2 cystatin genes and pseudogenes. This gene is located in the cystatin locus and encodes a cysteine proteinase inhibitor found in saliva, tears, urine, and seminal fluid.

Dogs with access to the outdoors may introduce outdoor allergens such as mold and pollen with larger animals tracking in more of these allergens. It is well established that most individuals with dog allergy also suffer with additional environmental allergies. Individuals with dog allergy may also be at increased risk for human protein hypersensitivity with cross-reactivity of dog dander allergen and human seminal fluid.

HIV-1 has also shown enhancement of infection in HT-29 cells when the viruses were pre-opsonized with complements C3 and C9 in seminal fluid. This enhanced rate of infection was almost 2 times greater than infection of HT-29 cells with virus alone. Subramanian et al., reported that almost 72% of serum samples out of 39 HIV positive individuals contained complements that were known to enhance the infection.

Soon after, the male positions himself at the rear of the female's abdomen in a low posture to tap and lick the female genitalia. Finally, the male curls his abdomen and attempts copulation. Females can reject males by moving away, kicking, and extruding their ovipositor. Copulation lasts around 15–20 minutes, during which males transfer a few hundred, very long (1.76 mm) sperm cells in seminal fluid to the female.

The carnitine content of seminal fluid is directly related to sperm count and motility, suggesting that the compound might be of value in treating male infertility. One study concluded that carnitine supplementation may improve sperm quality, and the reported benefits may relate to increased mitochondrial fatty-acid oxidation (providing more energy for sperm) and reduced cell death in the testes of mice subjected to physical stress to the testes.

Prostasin is a protein that in humans is encoded by the PRSS8 gene. This gene encodes a trypsinogen, which is a member of the trypsin family of serine proteases. This enzyme is highly expressed in prostate epithelia and is one of several proteolytic enzymes found in seminal fluid. The proprotein is cleaved to produce a light chain and a heavy chain which are associated by a disulfide bond.

Prostate cancer is associated with urinary dysfunction as the prostate gland surrounds the prostatic urethra. Changes within the gland directly affect urinary function. Because the vas deferens deposits seminal fluid into the prostatic urethra, and secretions from the prostate are included in semen content, prostate cancer may also cause problems with sexual function and performance, such as difficulty achieving erection or painful ejaculation. Metastatic prostate cancer can cause additional symptoms.

In cartilaginous fishes, the part of the archinephric duct closest to the testis is coiled up to form an epididymis. Below this are a number of small glands secreting components of the seminal fluid. The final portion of the duct also receives ducts from the kidneys in most species. In amniotes, however, the archinephric duct has become a true vas deferens, and is used only for conducting sperm, never urine.

The direct or indirect interference of the seminal plasma with the function of many types of immunocompetent cells including T cells, B cells, NK cells and macrophages has been shown. These effects of immunosuppression are not species-specific and are found to be in physiological concentrations that are normally seen in the urogenital tract of females. RNase secretion has not been detected in the seminal fluid of any other mammal.

This factor blocks the binding of sperm cells and exogenous DNA because in the presence of the inhibitory factor, DBPs lose their ability to bind to exogenous DNA. In the absence of this inhibitory factor, DBPs on sperm cells are able to interact with DNA and can then translocate the DNA into the cell. Therefore, the seminal fluid must be removed from the sperm samples by extensive washing immediately after ejaculation.

In rare cases, people have been known to experience allergic reactions to seminal fluids, known as human seminal plasma hypersensitivity. Symptoms can be either localized or systemic, and may include itching, redness, swelling, or blisters within 30 minutes of contact. They may also include hives and even difficulty breathing. Options for prevention of semen allergy include avoiding exposure to seminal fluid by use of condoms and attempting desensitization.

Belmont, CA: Star. At the time that the penis develops, the seminal vesicles, the prostate, and the bulbourethral gland also enlarge and develop. The first ejaculation of seminal fluid generally occurs about one year after the beginning of accelerated penis growth, although this is often determined culturally rather than biologically, since for many boys first ejaculation occurs as a result of masturbation. Boys are generally fertile before they have an adult appearance.

A serologist established that the blood on Tumekica's underwear and pajama bottoms, as well as that on defendant's boxer shorts and the blue jeans, came from the victim. The seminal fluid found on these articles of clothing came from an individual with type-O blood, the same type as Jones's. Jones did not take the stand, and the defense presented no evidence. The jury unanimously found Jones guilty as charged of first degree murder.

In traditional Chinese medicine, menstrual blood and seminal fluid represent the fundamental energies of women and men. The cessation of the menstrual flow in women structurally corresponds with the retention of the semen in men. In both cases, loss of an essential substance is stopped and with it, the loss of original energy. This cessation creates a reversal of the natural processes and allows the symbolic creation of a new internal sprout of energy that turns into an embryo of energy.

Motile sperm cells of algae and seedless plants Motile sperm cells typically move via flagella and require a water medium in order to swim toward the egg for fertilization. In animals most of the energy for sperm motility is derived from the metabolism of fructose carried in the seminal fluid. This takes place in the mitochondria located in the sperm's midpiece (at the base of the sperm head). These cells cannot swim backwards due to the nature of their propulsion.

The amount of semen produced and expelled during ejaculation corresponds to the length of time that the male is sexually aroused before ejaculation occurs. Generally, the longer the period of arousal, the larger the amount of seminal fluid. Ejaculation and orgasm may occur simultaneously, however they are not coupled, in that one may occur without the other. For example, a man may have a dry orgasm (termed Retrograde ejaculationRetrograde ejaculation treatments); there is no expulsion of ejaculate however the man still experiences orgasm.

The central idea is to understand how evolutionary processes operate on the molecular level. Researchers at CIBER conducted the first large scale analyses of the proteins present in glandular secretions supporting honeybee sperm, such as seminal fluid and spermathecal fluid. For experimental work, CIBER maintains and breeds its own bee stock of around 60 colonies, kept at an apiary on the campus of the University of Western Australia. During the winter month, most of the bee stock is moved north to overwintering grounds.

They placed the male rhino in an enclosure with both female northern white rhinos in hopes to cross-breed the subspecies. Having the male rhino with two female rhinos was expected to increase competition for the female rhinos and in theory should result in more mating experiences. Ol Pejeta Conservancy did not announce any news of rhino mating. On 22 August 2019, using (ICSI), eggs from Fatu and Najin "were successfully inseminated" using the seminal fluid from Saut and Suni.

Semen is moved into the urethra following contractions of the smooth muscle of the vas deferens and seminal vesicles, following stimulation, primarily of the glans penis. Stimulation sends nerve signals via the internal pudendal nerves to the upper lumbar spine; the nerve signals causing contraction act via the hypogastric nerves. After traveling into the urethra, the seminal fluid is ejaculated by contraction of the bulbocavernosus muscle. The secretions of the prostate include proteolytic enzymes, prostatic acid phosphatase, fibrinolysin, zinc, and prostate-specific antigen.

For example, people with the CCR5-Δ32 mutation are resistant to infection by the R5 virus, as the mutation leaves HIV unable to bind to this co-receptor, reducing its ability to infect target cells. Sexual intercourse is the major mode of HIV transmission. Both X4 and R5 HIV are present in the seminal fluid, which enables the virus to be transmitted from a male to his sexual partner. The virions can then infect numerous cellular targets and disseminate into the whole organism.

Male accessory gland presented in a 3D medical animation still shot Male accessory glands (MAG) in humans are the seminal vesicles, prostate gland, and the bulbourethral glands (also called Cowper's glands). In insects, male accessory glands produce products that mix with the sperm to protect and preserve them, including seminal fluid proteins. Some insecticides can induce an increase in the protein content of the male accessory glands of certain types of insects. This has the unintended effect of increasing the number of offspring they produce.

HIV is contracted by coming in contact with the bodily fluids of someone HIV positive. These fluids include blood, semen, pre-seminal fluid, rectal fluids, vaginal fluids, and breast milk. An individual can become infected with HIV if these fluids enter the bloodstream by way of a mucous membrane, damaged tissue or injection. Common HIV routes of transmission include sharing needles, having unprotected sex with someone who is HIV positive, mother to fetus during pregnancy, being stuck with an HIV-contaminated sharp object, etc.

Prostasomes are extracellular vesicles (40-500 nm in diameter) secreted by the prostate gland epithelial cells into seminal fluid. They possess an unusual lipid composition and a tight and highly ordered structure of their lipid bilayer membrane, resembling that of lipid raft domains. Prostasomes appear to improve sperm motility and protect against attacks from the female immune defense during the passage to the egg. The name prostasomes was coined in the early 1980s by combining the terms "prosta"=prostate and "soma" (Greek for "body").

The third part of the duct system is the ejaculatory ducts, which are -long paired tubes that pass through the prostate gland, where semen is produced. The prostate gland is a solid, chestnut-shaped organ that surrounds the first part of the urethra, which carries urine and semen. Similar to the female G-spot, the prostate provides sexual stimulation and can lead to orgasm through anal sex. The prostate gland and the seminal vesicles produce seminal fluid that is mixed with sperm to create semen.

The method for SMGT uses the sperm cell, a natural vector of genetic material, to transport exogenous DNA. The exogenous DNA molecules bind to the cell membrane of the head of the sperm cell. This binding and internalization of the DNA is not a random event. The exogenous DNA interacts with the DNA-binding proteins (DBPs) that are present on the surface of the sperm cell.3 Spermatozoa are naturally protected against the intrusion of exogenous DNA molecules by an inhibitory factor present in mammals’ seminal fluid.

With Mingo's written consent, the police recovered a pair of stained brown and white boxer shorts from the trunk of Mingo's car. Analysis confirmed the presence of blood and seminal fluid on the boxer shorts. On the basis of this information, police obtained a warrant and arrested Jones on Sunday. After advise and waiver of his rights, Jones gave a video-taped statement in which he asserted that he and Rudolph Springer had gone to the victim's house early Saturday morning to commit a burglary.

Since Laudenberg had no criminal record, they had to find a way to obtain his DNA through other means. An undercover officer invited Adolph over some coffee in a Torrance restaurant, to which the latter agreed. After discussing various topics, and almost getting caught in the act, Laudenberg walked away without throwing out his coffee cup. The other officer then swept in and got the cup, from which DNA samples were extracted and sent for testing - they matched seminal fluid found on Lois Petrie's corpse.

Once he has a tight grip, he turns upside-down and presses his ventral side against hers. He then inserts one of his claspers into her cloaca, where it remains for 60–90 seconds. The clasper forms a tube which channels sperm from the genital papilla; a siphon propels the seminal fluid into the oviduct. The male continues to grip the female's pectoral fin with his teeth for a further few minutes as both continue to swim, often followed by up to 20 other males.

The coronal ridge is the part of the human penis thought to have evolved to allow for semen displacement. Research has studied how much semen is displaced by differently shaped artificial genitals. This research showed that, when combined with thrusting, the coronal ridge of the penis is able to remove the seminal fluid of a rival male from within the female reproductive tract. It does this by forcing the semen under the frenulum of the coronal ridge, causing it to collect behind the coronal ridge shaft.

The protein has a physiological function in regulation of water transport mainly in apocrine glands in the axilla, vulva, eyelid and ear canal, serous cells of the submandibular salivary gland, serous cells of the submucosal glands of the bronchi, and accessory lacrimal glands as well as cutaneous eccrine glands. It is also found in amniotic fluid and seminal fluid. PIP has the ability to bind immunoglobulin G (IgG), IgG-Fc, CD4-T cell receptor suggesting a wide range of immunological functions. PIP also binds to AZGP1.

It has been postulated that the shape of the human penis may have been selected by sperm competition. The shape could have favored displacement of seminal fluids implanted within the female reproductive tract by rival males: the thrusting action which occurs during sexual intercourse can mechanically remove seminal fluid out of the cervix area from a previous mating. The penile morphology of some types of strepsirrhine primates has provided information about their taxonomy. Male galago species possess very distinctive penile morphology that can be used to classify species.

These homologs are highly conserved and also exist as multimers. However, the cauxin concentrations in urine seems to vary depending on the species with larger species generally having lower concentrations in urine than smaller domestic cats. This is likely a result of decreased reliance on felinine, due to the existence of additional, more complex signaling molecules that are present in the urine of larger cats. Cauxin is also present in the seminal fluid of cats and several other mammals, including sheep, pigs, cattle, rams, boars, rats, and mice.

Displacement from the seminal receptacle is more significant than displacement from the spermathecae. Incapacitation of first male sperm by second male sperm becomes significant 2–7 days after copulation. The seminal fluid of the second male is believed to be responsible for this incapacitation mechanism (without removal of first male sperm) which takes effect before fertilization occurs. The delay in effectiveness of the incapacitation mechanism is believed to be a protective mechanism that prevents a male fly from incapacitating his own sperm should he mate with the same female fly repetitively.

PSA was first identified by researchers attempting to find a substance in seminal fluid that would aid in the investigation of rape cases. PSA is now used to indicate the presence of semen in forensic serology. The semen of adult males has PSA levels far in excess of those found in other tissues; therefore, a high level of PSA found in a sample is an indicator that semen may be present. Because PSA is a biomarker that is expressed independently of spermatozoa, it remains useful in identifying semen from vasectomized and azoospermic males.

After oral administration fleroxacin is rapidly and well absorbed from the gastrointestinal tract and shows a good bioavailability. The antibiotic is widely distributed throughout the body and in the different biological tissues. In many biologic specimens the levels of fleroxacin are similar to those in plasma, but in bile, nasal secretions, seminal fluid, lung, bronchial mucosa, and ovaries, the drug concentrations are 2-3 times higher than those in plasma. The serum elimination half-life, in subjects with normal renal function, is relatively long (9–12 hours), which permits once-daily dosing.

Toronto, ON. The emission stage involves the workings of several structures of the ejaculatory duct; contractions of the prostate gland, the seminal vesicles, the bulbourethral gland and the vas deferens push fluids into the prostatic urethra. The semen is stored here until ejaculation occurs. Muscles at the base of the penis contract in order to propel the seminal fluid trapped in the prostatic urethra through the penile urethra and expel it through the urinary meatus. The ejaculate is expelled in spurts, due to the movement of the muscles propelling it.

Environmental microbes have been found to play a critical role in courtship behavior, female survival, and mating dynamics of the Pennsylvania funnel-web spider. During copulation, it is possible for the male to transmit environmental microbes to the female via the seminal fluid. Therefore, copulation can alter the composition of the female microbiota. In a study by Spicer and colleagues in 2019, the authors found that when either the male or female of the Pennsylvania funnel-web spider is exposed to environmental microbes, their mating behavior, fecundity, and survivorship are altered.

Copulation in Drosophila melanogaster Drosophila melanogaster are a promiscuous species in which mate choice is a recurring event, fostering the development of interlocus sexual conflict. The ejaculate of male fruit flies contains seminal fluid proteins (SFPs) that play a significant role in determining female fitness. SPFs are capable of influencing processes such as oogenesis, sperm storage, and the onset of ovulation. This ultimately leads to a decrease in female fitness, as increasing behaviours such as egg-laying can decrease the success of fertilization, delay remating, and impact the female’s life span.

These barriers are not always absolute and could explain the inconsistent experimental outcomes of SMGT.4 If there are natural barriers against SMGT, then the successes may only represent unusual cases in which the barriers failed. Two barriers have been identified; the inhibitory factor in seminal fluid that prevents binding to foreign DNA molecules and a sperm endogenous nuclease activity that is triggered upon interaction of sperm cells with foreign DNA molecules.4 These protections give reason to believe that unintentional interactions between sperm and exogenous genetic sequences is kept to a minimal.

When gilts were infected with PPV before day 55 of gestation, their pigs were born infected but without antibody. Virus was isolated from kidneys, testicles, and seminal fluid of such pigs killed at various times after birth up to the time they were 8 months of age; at which time the experiment was terminated. Results of another study, wherein dams were infected early in gestation and their pigs were born infected but without antibody, also suggest an acquired immunotolerance. A possible example of an infected, immunotolerant, sexually active boar was reported.

Follicular flushing has not been found to increase pregnancy rates, nor result in an increase in oocyte yield. On the other hand, it requires a significantly longer operative time and more analgesia. Seminal fluid contains several proteins that interact with epithelial cells of the cervix and uterus, inducing active gestational immune tolerance. There are significantly improved outcomes when women are exposed to seminal plasma around the time of oocyte retrieval, with statistical significance for clinical pregnancy, but not for ongoing pregnancy or live birth rates with the limited data available.

An example is conflict over mating rates. Males frequently have a higher optimal mating rate than females because in most animal species, they invest fewer resources in offspring than their female counterparts. Therefore, males have numerous adaptations to induce females to mate with them. Another well-documented example of inter- locus sexual conflict are the seminal fluid proteins of Drosophila melanogaster, which up-regulate females' egg-laying rate and reduces her desire to re-mate with another male (serving the male's interests), but also shorten the female's lifespan, reducing her fitness.

On July 11, 2013, Boston law enforcement officials announced that DNA evidence had linked DeSalvo to the rape and murder of 19-year-old Mary Sullivan. DeSalvo's remains were exhumed, and the Suffolk District Attorney Daniel F. Conley said he expected investigators to find an exact match when the evidence is compared with his DNA. On July 19, 2013, Suffolk County DA Daniel F. Conley, Mass. Attorney General Martha Coakley and Boston Police Commissioner Edward F. Davis announced that DNA test results proved DeSalvo was the source of seminal fluid recovered at the scene of Sullivan's 1964 murder.

In the plateau phase, the penis increases in diameter, the testicles become more engorged, and the Cowper's glands secrete pre-seminal fluid. The orgasm phase, during which rhythmic contractions occur every 0.8 seconds, consists of two phases; the emission phase, in which contractions of the vas deferens, prostate, and seminal vesicles encourage ejaculation, which is the second phase of orgasm. Ejaculation is called the expulsion phase; it cannot be reached without an orgasm. In the resolution phase, the male is now in an unaroused state consisting of a refactory (rest) period before the cycle can begin.

The film takes place following a severe drop in the global population. The Survivalist (Martin McCann) is first seen burying the body of a near-naked man, and then resetting a bear trap. He is then shown to be living efficiently in the wild in a small cabin; he harvests vegetable crops for food, forages berries, washes clothes in a nearby stream, fertilises seeds with his seminal fluid, and lays traps against intruders around his small farm's perimeter. One day, the Survivalist hears noise outside his cabin, and rushes out to find an old woman and a younger woman standing outside his door.

For egg donation, there is evidence of a lower pregnancy rate and a higher cycle cancellation rate when the progesterone supplementation in the recipient is commenced prior to oocyte retrieval from the donor, as compared to commenced day of oocyte retrieval or the day after. Seminal fluid contains several proteins that interact with epithelial cells of the cervix and uterus, inducing active gestational immune tolerance. There are significantly improved outcomes when women are exposed to seminal plasma around the time of embryo transfer, with statistical significance for clinical pregnancy, but not for ongoing pregnancy or live birth rates with the limited data available.

The human penis may have been selected to displace seminal fluids implanted in the female reproductive tract by a rival male. Specifically, the shape of the coronal ridge may promote displacement of seminal fluid from a previous mating via thrusting action during sexual intercourse. A 2003 study by Gordon G. Gallup and colleagues concluded that one evolutionary purpose of the thrusting motion characteristic of intense intercourse is for the penis to “upsuck” another man's semen before depositing its own. Evolution to increase ejaculate volume in the presence of sperm competition has a consequence on testis size.

According to a review by Brainard, et al., Ebola virus was identified in almost 3 out of 4 seminal fluid samples (18 survivors) almost 4 months after initial infection, with the last positive samples being more than 6 months (203 days) after infection had occurred. Another aspect of survivors of the Ebola virus, is that it could become sexually transmitted, as the virus is present in semen nine months after the individuals are declared free of Ebola. A 2017 study found the virus in the semen of some men after more than two years following the recovery from the acute infection.

The first marker is methylated only in the target fluid while the second is methylated in the rest of the fluids. For instance, if venous blood marker A is un-methylated and venous blood marker B is methylated in a fluid, it indicates the presence of only venous blood. In contrast, if venous blood marker A is methylated and venous blood marker B is un-methylated in some fluid, then that indicates venous blood is in a mixture of fluids. Some examples for DNA methylation markers are Mens1(menstrual blood), Spei1(saliva), and Sperm2(seminal fluid).

Through Parker’s genetic threshold model, it was discovered that female yellow dung flies can be injured in battles between male suitors. Males are selected to evolve traits for competitive ability that would increase their reproductive success, but females would evolve a set of antagonistic adaptations to reduce their chances of being injured during these interactions. Male yellow dung flies use pheromones, seminal fluid proteins (SPFs), and aggressive behaviour attributable to their size to manipulate females during courtship. As yellow dung flies are a polyandrous species, females obtain sperm from multiple males which is stored for fertilization.

Another cause of aspermia is ejaculatory duct obstruction, which may result in a complete lack of or a very low-concentration semen (oligospermia), in which the semen contains only the secretion of accessory prostate glands downstream to the orifice of the ejaculatory ducts. Aspermia can be caused by androgen deficiency. This can be the result of absence of puberty, in which the prostate gland and seminal vesicles (which are the main sources of semen) remain small due to lack of androgen exposure and do not produce seminal fluid, or of treatment for prostate cancer, such as maximal androgen blockade.

Abella, along with Rebecca de Guarna, specialized in the area of embryology. She published two treatises: De atrabile (On Black Bile) and De natura seminis humani (on the Nature of the Seminal Fluid), neither of which survive today. In Salvatore De Renzi's nineteenth-century study of the Salerno School of Medicine, Abella is one of four women (along with Rebecca de Guarna, Mercuriade, and Constance Calenda) mentioned who were known to practice medicine, lecture on medicine, and wrote treatises. These attributes placed Abella into a group of women known as the Mulieres Salernitanae, or women of Salerno.

The mimicking of flowers to resemble female wasp parts has since been recorded in other orchid genera but only in Cryptostylis has the insect been observed ejecting seminal fluid containing sperm cells. Coleman suggested that the males are more strongly attracted to the orchid flowers than to female wasps of the same species. The flowers of Cryptostylis orchids and female wasp body parts are very similar in colour when viewed under a hymenopteran visual system, despite looking different to human eyes. Although the colours that ichneumon wasps see are unknown, bees and wasps have similar perception with green, blue and ultraviolet wavelengths.

Albert Henry DeSalvo (September 3, 1931 – November 25, 1973) was an American criminal and serial killer in Boston, Massachusetts who confessed to being the "Boston Strangler", the murderer of 13 women in the Boston area from 1962 to 1964. It was widely believed that DeSalvo was imprisoned for a series of the rapes. However, his murder confession has been disputed, and debate continues as to which crimes he actually committed. In July 2013, DNA was matched between seminal fluid found at the rape and murder of Mary Sullivan and DNA obtained from DeSalvo's nephew, linking DeSalvo to the murder of Sullivan and excluding 99.9% of the remaining population.

The physiological role of this enzyme is not yet found and thus it is still a mystery why the seminal fluid in bovine has such a higher concentration of this enzyme. In the evolutionary process, it has acquired new behaviors such as being a dimer with composite active sites binding firmly to anionic glycolipids, including bovine spermatozoa seminolipid, a fusogenic sulfated galactolipid possessing immunosuppressive and cytostatic activities whereas the ancestral RNase does not possess these behaviors. The homolog of RNase A, bovine seminal ribonuclease (BS-RNase), has a specific antitumor activity. In the immunoregulation of both male and female genital systems, the seminal plasma plays a prominent role in immunosuppression.

The fact that the embryo's tissue is half foreign and unlike mismatched organ transplant, it is not normally rejected, suggests that the immunological system of the mother plays an important role in pregnancy. The placenta also plays an important part in protecting the embryo for the immune attack from the mother's system. Studies also propose that proteins in semen may help woman’s immune system prepare for conception and pregnancy. For example, there is substantial evidence for exposure to partner's semen as prevention for pre-eclampsia, largely due to the absorption of several immune modulating factors present in seminal fluid, such as transforming growth factor beta (TGFβ).

Copulation occurs in M. celer as it does in many other spider species, with the male inserting the pedipalps into the female's epigyne and pumping seminal fluid into the female. Hence, fertilization occurs internally within the female. During copulation, the hairs on the male's front two pairs of legs have been observed to flicker in sync with the pumping actions in the pedipalps, and occasionally the male may lubricate the embolus, the tip of the pedipalp which penetrates the epigyne, with his chelicerae. After copulation, which usually lasts between roughly 3 and 10 minutes, the male remains on the female until she becomes active again.

Pap staining is used to differentiate cells in smear preparations (in which samples are spread or smeared onto a glass microscope slide) from various bodily secretions and needle biopsies; the specimens may include gynecological smears (Pap smears), sputum, brushings, washings, urine, cerebrospinal fluid, abdominal fluid, pleural fluid, synovial fluid, seminal fluid, fine needle aspirations, tumor touch samples, or other materials containing loose cells. The pap stain is not fully standardized and comes in several formulations, differing in the exact dyes used, their ratios, and timing of the process. Pap staining is usually associated with cytopathology in which loose cells are examined, but the stain has also been modified and used on tissue slices.

Spiny genitalia, such as of this bean weevil, may help to remove sperm from the sperm storage structures Antagonistic coevolution is the relationship between males and females where sexual morphology changes over time to change with the opposite's sex traits in order to achieve the maximum reproductive success. One such development is alternative sperm storage sites, such as seminal receptacles, spermathecae, and pseudospermathecae, that are complex and extremely variable to allow for more choice in sperm selection. In some cases, sperm storage sites can produce proteases that break down various proteins in male seminal fluid resulting in female selection in sperm. Like females, males have developed responses to counter evolutionary adaptations of the opposite sex.

Graphic depicting the human skin microbiota, with relative prevalences of various classes of bacteria The human microbiome is the aggregate of all microbiota that reside on or within human tissues and biofluids along with the corresponding anatomical sites in which they reside, including the skin, mammary glands, placenta, seminal fluid, uterus, ovarian follicles, lung, saliva, oral mucosa, conjunctiva, biliary tract, and gastrointestinal tract. Types of human microbiota include bacteria, archaea, fungi, protists and viruses. Though micro-animals can also live on the human body, they are typically excluded from this definition. In the context of genomics, the term human microbiome is sometimes used to refer to the collective genomes of resident microorganisms; however, the term human metagenome has the same meaning.

Human ALOX15 protein is highly expressed in circulating blood eosinophils and reticulocytes, cells, bronchial airway epithelial cells, mammary epithelial cells, the Reed-Sternberg cells of Hodgkin's lymphoma, corneal epithelial cells, and dendritic cells; it is less strongly expressed in alveolar macrophages, tissue mast cells, tissue fibroblasts, circulating blood neutrophils, vascular endothelial cells, joint Synovial membrane cells, seminal fluid, prostate epithelium cells, and mammary ductal epithelial cells. The distribution of Alox15 in sub-human primates and, in particular, rodents differs significantly from that of human ALOX15; this, along with their different principal product formation (e.g. 12-HETE rather than 15-HETE) has made the findings of Alox15 functions in rat, mouse, or rabbit models difficult to extrapolate to the function of ALOX15 in humans.

In the laboratory, for ICSI treatments, the identified eggs are stripped of surrounding cells (also known as cumulus cells) and prepared for fertilisation. An oocyte selection may be performed prior to fertilisation to select eggs that can be fertilized, as it is required they are in metaphase II. There are cases in which if oocytes are in the metaphase I stage, they can be kept being cultured so as to undergo a posterior sperm injection. In the meantime, semen is prepared for fertilisation by removing inactive cells and seminal fluid in a process called sperm washing. If semen is being provided by a sperm donor, it will usually have been prepared for treatment before being frozen and quarantined, and it will be thawed ready for use.

The girl was reported missing by her mother and a search was initiated, with the mother's boyfriend finding Lisa's body ditched in a ravine behind the school's premises the following morning. She was almost completely nude save for a sock, with stab wounds and strangulation marks on her body. Unlike the previous victims, Haenel wasn't sexually assaulted, so seminal fluid couldn't be collected, but the killer's DNA was still obtained via an unsmoked Newport-brand cigarette found close to the body, which had traces of Lisa's blood on the burn end and saliva from the murderer at the other. On June 13, 1994, Watson committed his last murder, killing 37-year-old office manager Debra Cobb during a robbery of her workplace in Forestville.

A person is guilty of obstructing government administration if the person intentionally interferes by force, violence or intimidation or by any physical act with a public servant performing or purporting to perform an official function. This goes for the obstruction of any police officer, constable, sheriff's deputy, conservation ranger, state trooper, detective, or any EMT or other authorized medical technician or firefighter with violence or force during the performance of their duties. Also it is a felony for any person to interfere with any government official such as any duly sworn law enforcement official such as any police officer, prison guard, corrections officer, conservation ranger, marshal, sheriff's deputy, jailer, or probation officer by the expelling or throwing of human or animal urine, feces, blood, vomitus, or seminal fluid on him or her while engaging in the performance of his or her official duties.

Prior to this outbreak, it was believed that human-to-human transmission occurred only via direct contact with blood or bodily fluids from an infected person who is showing symptoms of infection, by contact with the body of a person who had died of Ebola, or by contact with objects recently contaminated with the body fluids of an actively ill infected person. It is now known that the Ebola virus can be transmitted sexually. Over time, studies have suggested that the virus can persist in seminal fluid, with a study released in September 2016 suggesting that the virus may survive more than 530 days after infection. EBOV RNA in semen is not the same situation as perseverance of EBOV in semen, however the "clinical significance of low levels of virus RNA in convalescent" individuals who are healthy is unknown.

In the realm of tumah and taharah terminology, the term Av HaTumah ("father of uncleanness," or simply Av) is a rabbinic term for a person or object that is in a state of tumah (ritual impurity), second in severity only to corpse uncleanness. Anything suffering from Av HaTumah ("Father of uncleanness"), such as carrion, the blood of a menstruate woman, seminal fluid, etc., can render those persons who touch it defiled at a further remove, known as a "first-grade level of uncleanness." A person or object that is a Av HaTumah has the ability to transfer its tumah to another person or object, such as clothing (usually at a downgraded level of tumah), while they, in turn, have the ability to transfer their tumah to both foods and drink (in the case of foods, at a downgraded level, but in the case of drinks, at the very same level).

During the beginning of the 2nd-century CE, the rabbis of Usha, under the leadership of Rabban Shimon ben Gamliel, further augmented the earlier rabbinic decrees, making the air-space of foreign lands capable of disqualifying the Terumah insofar that it cannot be eaten, but the earth from the same lands capable rendering a defilement to the Terumah, requiring it to be burnt. By rabbinic decree, the defilement of foreign lands was made to be tantamount to the defilement of a field where a grave had been ploughed (Beit ha-Peras), meaning, such lands suffer from a severe grade of uncleanness, or what is known as a "Father of uncleanness" (as if the land itself had the same defilement that comes with carrion, or with menstrual blood or with a seminal fluid), and, therefore, being capable of rendering defilement at a further remove unto persons who enter therein (i.e. a first-grade level of uncleanness), while the person himself who was defiled by such lands, if he touched Terumah, renders it defiled at a further remove (i.e.