Scientists Discover Key Egg Enzyme For Blocking Sperm Entry After Fertilization

Countless sperm may surround an egg at one time, yet only one must be allowed to fertilize it. In fact, an egg must undergo a rapid and complex series of changes to prevent entry by more than one sperm, called polyspermy, because it is detrimental to normal development. A study published in the December issue of Developmental Cell provides ...

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