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A 20-year-old female asked:

My due date is december 15, when did the sperm most likely entered the body first to fertilize the egg?

1 doctor answer2 doctors weighed in
Dr. Robert Killian
General Practice 28 years experience
Conception: There is a five day window. If more than one man's sperm was inside your vagina in that five day window you will need paternity testing as you have been taught repeatedly here on Health Tap. We have already given you the tools to verify this independently. Your baby was conceived from sperm left between 3/19/2014 to 3/24/2014. You can verify here: http://www.babymed.com/conception-calculator.

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Last updated Jul 29, 2014

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