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  • 14.03.2010
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Sperm fertilizing egg

A man may ejaculate 40 million to million sperm, which start swimming upstream toward the fallopian tubes on their mission to fertilize an egg. At the beginning of the process, the sperm undergoes a series the enzymatic penetration of the egg's tough membrane, the. Read and learn for free about the following article: Egg meets sperm. of the cell membrane, and will help make sure that only one sperm can fertilize the egg. During fertilization, the sperm fuses with the egg, and then, causes a reaction that prevents other sperm from fertilizing the same egg. After fertilization, the embryo moves slowly back towards your womb where it finally attaches itself to the wall of the uterus and starts growing. Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the fallopian tube. The result of this union is the production of a zygote cell, or fertilized egg, initiating prenatal development. Scientists discovered the dynamics of human fertilization in . The cortical reaction ensures that only one sperm fertilizes the egg. The other sperm die within 48 hours. The fertilized egg is now called a zygote. The depolarization caused by sperm penetration results in one last round of division in the egg's nucleus, forming a Author: Craig Freudenrich, Ph.D. & Molly Edmonds.
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