Retrograde ejaculation

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In males, retrograde ejaculation occurs when the fluid to be ejaculated, which would normally exit via the urethra, is redirected towards the urinary bladder. Normally the sphincter of the bladder contracts and the sperm goes to the urethra towards the area of least pressure. In retrograde ejaculation this sphincter doesn't work well. Causes may be in the autonomic nervous system or the operation of the prostate. Retrograde ejaculation is a common complication of trans-urethral resection of the prostate, a procedure in which diseased tissue is removed, slice by slice, through a resectoscope passed along the urethra.

This may cause a couple to experience problems such as infertility, as most sperm do not get to the vagina and the rest of the female reproductive system.

As a method to induce pregnancy, the retrograde ejaculator's urine is centrifuged and the isolated sperm is then injected into the woman.

In the past, in couples where the male has had retrograde ejaculation, the man has urinated into his wife's vagina in an attempt to conceive.

Some fields of alternative medicine actually recommend and teach retrograde ejaculation as a way of "conserving the body's energy" or "conserving sperm". However, there is no scientific basis for this, as the retrograde-ejaculated sperm are simply urinated away at the next urination. Many doctors do not recommend learning how to perform retrograde ejaculation, as once learnt, the habit may be hard to "unlearn".

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