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New research finds that even though hens aren't terribly picky about their mates, they are picky about whose sperm makes it to the egg. Female domestic chickens generally mate with multiple males and are known to sometimes eject sperm following mating encounters. It was unclear, however, whether the sperm ejection was a consequence of receiving a large amount of ejaculate, or because hens are actively trying to rid themselves of undesirable sperm.

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Ejaculationthe release of sperm cells and seminal plasma from the male reproductive system. Ejaculation takes place in two phases: in the first, or emission, stage, sperm are moved from the testes and the epididymis where the sperm are stored to the beginning of the urethraa hollow tube running through the penis that transports either sperm or urine; in the second stage, ejaculation proper, the semen is moved through the urethra and expelled from the body. Sperm cells that are stored in the male body are not capable of self-movement because of the acidity of the accompanying fluids.

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Needing to produce a semen sample, for either semen analysis or fertility treatment use, may lead to "performance anxiety" or the inability to ejaculate. This should be no surprise when you consider all the factors involved with producing the semen sample. Often the semen sample must be produced in the fertility clinicin a room set aside for this purpose.

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Delayed ejaculation is a medical condition in which a male cannot ejaculate. It may occur either during intercourse or by manual stimulation with or without a partner. Ejaculation is when semen is released from the penis. Most men ejaculate within a few minutes of starting to thrust during intercourse.

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New research finds that even though hens aren't terribly picky about their mates, they are picky about whose sperm makes it to the egg. Female domestic chickens generally mate with multiple males and are known to sometimes eject sperm following mating encounters. It was unclear, however, whether the sperm ejection was a consequence of receiving a large amount of ejaculate, or because hens are actively trying to rid themselves of undesirable sperm.

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Ejaculation is the discharge of semen normally containing sperm from the male reproductory tractusually accompanied by orgasm. It is the final stage and natural objective of male sexual stimulationand an essential component of natural conception. In rare cases, ejaculation occurs because of prostatic disease.

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Retrograde ejaculation occurs when semen enters the bladder instead of emerging through the penis during orgasm. Although you still reach sexual climax, you might ejaculate very little or no semen. This is sometimes called a dry orgasm.

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When the blood vessels of the corpora cavernosa relax and open up, blood rushes in through the cavernosus arteries to fill them. The blood then gets trapped under high pressure, creating an erection. Sexual stimulation and friction provide the impulses that are delivered to the spinal cord and into the brain. Ejaculation is a reflex action controlled by the central nervous system.

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New research finds that even though hens aren't terribly picky about their mates, they are picky about whose sperm makes it to the egg. Female domestic chickens generally mate with multiple males and are known to sometimes eject sperm following mating encounters. It was unclear, however, whether the sperm ejection was a consequence of receiving a large amount of ejaculate, or because hens are actively trying to rid themselves of undesirable sperm.

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