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during fertilization, how many sperm cell are needed to unite with the ovum​

Sagot :

Millions of sperm are in this small amount of semen, and they "swim" up from the vagina through the cervix and uterus to meet the egg in the fallopian tube. It takes only one sperm to fertilize the egg.

Answer:

It takes only one sperm to fertilize the egg. About 5 to 6 days after the sperm fertilizes the egg, the fertilized egg (zygote) has become a multicelled blastocyst.