Elk semen volume

Just as age weakens your muscles and changes your eyesight, it can reduce both the strength and volume of your ejaculation. Every ejaculation releases semen from your body through your penis. The process happens in two stages:. A problem in the first stage of this process can reduce the amount of semen you ejaculate. A problem with the second stage can reduce the force with which semen is expelled.

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Under the Microscope: Comparing Mammalian Spermatozoa Morphologies for Sexual Assault Cases

Semen | biochemistry | funnbee.info

In medicine, large volume of semen hyperspermia is a condition in which a male has an abnormally large ejaculate or semen volume is called hyperspermia. Males with hyperspermia usually have higher sex drives than males that do not. It is the opposite of hypospermia low semen volume , and is generally defined in humans when the ejaculate is over 5. In most cases, hyperspermia does not interfere with fertility. If the semen contains an adequate concentration of healthy sperm, higher volumes actually enhance fertility, respectively. Mature sperm cells in the testes that are ready for ejaculation pass through the epididymis tube that holds the testicles in place; Pic. Prior to release, semen is further augmented by fluid from the seminal vesicles, which are responsible for establishing the alkaline pH of semen.
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India testing a new way to deal with stray cattle: Eliminate male bovine before conception

Forensic sexual assault investigations often involve serology screenings, which can include laboratory tests for the indication of blood, semen, and saliva. To determine human spermatozoa from that of other mammals, first we have to understand how sperm is made in the human body. In the male reproductive tract, sperm cells are first made in the testicles, and subsequently moved to the epididymis for further development. Flavin is found in semen, which is able to emit fluorescence with a to nm ultraviolet wavelength light source that becomes very useful to investigators.
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Evolutionary theory proposes that exaggerated male traits have evolved via sexual selection, either through female mate choice or male—male competition. While female preferences for ornamented males have been amply demonstrated in other taxa, among mammals sexual characters are commonly regarded as weapons whose main function is to enhance male competitiveness in agonistic encounters. One particularly controversial hypothesis to explain the function of male sexual characters proposes that they advertise male fertility. We test this hypothesis in red deer Cervus elaphus , a species where sexual characters antlers reach an extreme degree of elaboration. We find that a global measure of relative antler size and complexity is associated with relative testes size and sperm velocity.
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  • added: 13.06.2019
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