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Birth Control/What influence the effectiveness of the pill?


More specifically, I was wondering if a large amount of sperm can offset the effectiveness of the pill?

Such as a man (or men, I guess, for the more active ladies) ejaculating several times inside a woman within a short amount of time (such as twice or even 3 times in one day).

Or maybe if they usually just ejaculate a large load each time...

Could too much sperm make birth control pills have a greater chance of failing?

There are already many million sperm from an ejaculation.  More sperm, even 2-3 times as many would not decrease the effectiveness of the pill.  The pill works mostly by preventing ovulation.  That means there is no egg to fertilize.  With no egg, there is nothing for the sperm to do.

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Norman Solberg


I am an OB-GYN physician. I can answer almost any question related to women's health.


35 years in an active OB-GYN practice.

Fellow, American College of Obstetrics and Gynecology

MD OB-GYN specialist

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