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Sperm Leaking Out After Intercourse- Lessons in Sperm Transport Through the Cervix

Catherine McDiarmid-Watt | Wednesday, May 23, 2007 | 0 comments

Question: Why does sperm leak out sometimes and not others? Does it mean the cervix is closed? Or there is more sperm sometimes than other times? If a lot leaks out, does that mean there was a lot of sperm? Is there any way to prevent it from leaking?

Answer: In a 5 yr study of 11 women (Baker & Bellis, 93), sperm loss after intercourse ("flow back") was observed - Flow back occurred 94% of the time, with an average loss of 35% of the sperm. It is totally normal and is not a sign that there is anything wrong. It is more pronounced the larger the ejaculate volume, and remember ejaculate quantity is impacted by "how turned on" your husband is. So if you have a great session, or it has been awhile seeing doing the deed, there will be more.

The sperm that penetrate into the cervical mucus begin to do so within 1.5 min, and they are pretty much done by 30 minutes, with no gain in sperm numbers in the cervical mucus or Fallopian tubes after 45 min from intercourse. Only thousands of the millions of sperm ejaculated in the vagina make it to the cervix and only hundreds of these make it to the Fallopian tube!

The very best of the best get there, the rest get washed out - it is OK!
Dr. E


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About Catherine: I am mom to three grown sons, two grandchildren and two rescue dogs. After years of raising my boys as a single mom, I remarried a wonderful man who had never had a child of his own. Unexpectedly, I found myself pregnant at 49!
Sadly we lost that precious baby at 8 weeks, and decided to try again. Five more losses, turned down for donor egg, foster care and adoption due to my age and losses - we have accepted that there will be no more babies in our house.

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