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A 50-year-old member asked:

What percentage of sperm is fit enough to fertilize an egg?

1 doctor answer1 doctor weighed in
Dr. Fletcher Derrick
Urology 64 years experience
Very few: with the in vitro fertilization programs ivf, we learned it takes about 40 sperm to work on penetrating the egg for one to make it in.

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Last updated Sep 8, 2016

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