How can only one sperm fertilize an egg

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Among the changes that occur in the zona is the proteolytic cleavage of ZP2 and the hydrolysis of sugar groups on ZP3 Figure Footer menu Contact Alice! The miracle of conception involves a cast of millions and you thought it was just you and your spouse in bed together! You can not feel that. Why can only one sperm fertilize an egg? About a week later, a ball of around cells called a blastocyst reaches your uterus and settles down into the uterine lining.
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Why is it that only one sperm can fertilize an egg

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Why is that only 1 sperm out of millions reach the egg?

If two sperm cells should happen to fertilize an egg, the number of chromosomes in the fertilized egg would be wrong and it would not be able to develop properly. What describe the type of cells that all animals are made of? The Sperm Provides a Centriole for the Zygote Once fertilized, the egg is called a zygote. HealthTap does not provide medical advice, diagnosis, or treatment.
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