Skip to main content

Where does the ejaculate go?

Share |
thomas asks:

When me and my girlfriend have sex, and I ejaculate, it seems that all of the ejaculate just comes right back out. Why doesn't the semen stay inside her?

Sarah replies:

The vagina is basically a closed-ended, muscular tube. Since it's essentially closed, anything that goes in must eventually come out. So just like normal vaginal discharges, anything left over (ejaculate, lubricant, etc.) after sex eventually flows out due to gravity. Some will flow out right away (as you are noticing) and the rest leaks out over the next day or so. Please note this does not mean that the sperm all leak out (though some do). Sperm are really tiny and they swim, so many of them have already moved on before the rest of the ejaculate flows back out. So even though gravity and the natural design of the body causes the fluid to eventually flow back out, keep in mind that if you and your partner are having unprotected intercourse you still have pregnancy and STI transmission risks.

written 09 Oct 2007 . updated 09 Oct 2007

More like This

I can't precisely say when it started. I can't have been older than 13 years old, sobbing in the bathroom as I desperately tried to insert a tampon before heading with my family to our annual 4th of...

Information on this site is provided for educational purposes. It is not meant to and cannot substitute for advice or care provided by an in-person medical professional. The information contained herein is not meant to be used to diagnose or treat a health problem or disease, or for prescribing any medication. You should always consult your own healthcare provider if you have a health problem or medical condition.