A lot: The sperm has to travel to the egg, fertilize it in the fallopian tube. The fertilized egg then divides many times, eventually becoming a blastocyst, entering the uterus and implanting in the uterine wall.
Answered 6/23/2017
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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