Both urine and semen will not be discharged from

Food in China by the at both male urination and ejaculation urethral two functions, some people asked the doctor, urine and semen in vitro will also routed to it? In fact, this worry is unnecessary, difficult to see clinical cases of sexual intercourse urination during ejaculation.

Normal circumstances, when the fullness of urine in the bladder, if conditions allow,"begins with an order voiding the cerebral cortex can be issued, through the sacral spinal cord reflex relaxation of the bladder sphincter relaxes and urine to be excreted in vitro.And when conditions allow, such as sleep, although the holding back urine and always dream to find the toilet, but that does not urinate.It seems, though sound asleep, the brain bladder fullness according to the information did not issue a voiding instructions.In addition to the sphincter in the bladder wall, the male urethral sphincter in still another.It is located in the middle third and inner third of the urethra at the junction, which is separated from the urethra through the urogenital place , also known as membranous urethral sphincter.It has nothing to do urinate, but only to play its role in ejaculation.

Men in sexual arousal, beginning at the bladder urethral sphincter and urethra in its outer membrane sphincter is a contraction.Thus, in between the formation of a small confined space, the rhythm of the epididymis and vas deferens smooth muscle contraction driven from the sperm, and here came from the prostate and seminal vesicle secretions mixed.When the savings to a certain amount of semen, or stimulation of the penis to achieve sufficient strength, sexual climax occurs when the ejaculation takes place, membranous urethral sphincter relaxation, the savings will be through the urethra sperm injection.Ejaculation, located inside the bladder sphincter relaxation will not, urine would not schedule them together, of course, sperm can not enter the bladder.In this case, speculated that the cerebral cortex may play a bladder sphincter control action, that is, the brain can be that this is not allowed to urinate in the conditions of the state.Therefore, not simultaneously ejaculation urination.

However, such a complex anatomical structures and physiological functions are sometimes faulty.If ejaculation occurs the vas deferens and other disorders of contraction rhythm or contraction of the bladder sphincter is not the same time, the semen may be discharged into the bladder rather than from the urethra, which is called retrograde ejaculation.Retrograde ejaculation is often one of the causes of infertility.For men, even retrograde ejaculation, will have the pleasure of ejaculation, so I probably would not notice.Infertility is often due to go to hospital only to find, or clear only after the woman said.This situation is not common in sexual intercourse or ejaculation delay ejaculation during intercourse when repeatedly endured.Such practices violate the laws of nature will cause the control urinary bladder sphincter relaxation, or if once this"retrograde ejaculation", would like to return to normal ejaculation very difficult.

causes retrograde ejaculation, the bladder neck sphincter is mainly due to organic disease to systolic dysfunction, ejaculation can not close off the reason.Such as urethral stricture, fine Fu hypertrophy, bladder neck caused by diabetes of youth disorder and surgical injury to the sphincter and so on.Taking guanethidine, reserpine and other drugs, can lead to retrograde ejaculation.