In Focus:

you should have an idea about retrograde ejaculation

Normally, semen exits the penis when a man ejaculates. Retrograde ejaculation causes some semen to travel backward into the bladder.

Normal ejaculation forces semen—sometimes called ejaculate—through the man's urethra and out of the penis. The ejaculate can move out of the penis because a small muscle, called the bladder sphincter, closes the opening to the bladder, preventing the semen from entering the bladder.

When the bladder sphincter does not work correctly, the bladder may not close completely, which can cause ejaculate to travel into the bladder rather than coming out of the penis.

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