Sperm fertilize an egg



Although it is happening every hour of every day, all over the world, the story of egg meeting sperm is still a tale worth telling. The tail is called a flagellum, and it uses the energy made by the mitochondria to move the sperm forward. This prevents fertilization of an egg by more than one sperm. Estrogen also relaxes the cervix, causes cervical mucus to become watery and more alkaline, and stimulates uterine contractions — all of which help sperm penetrate and navigate the female reproductive system. Retrieved 28 July



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The enzymes of the cortical granules further digest the zona pellucida, making it unable to bind more sperm, while other molecules found in the granules create a new protective layer around the fertilized egg. Jones and Kristin H. This page was last edited on 8 Februaryat

Sperm fertilize an egg
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The enzymes of the cortical granules further digest the zona pellucida, making it unable to bind more sperm, while other molecules found in the granules create a new protective layer around the fertilized egg. Retrieved from " https: Ovum Oviposition Oviparity Ovoviviparity Vivipary. Various exceptions to this sequence egg possible, including sperm fertilize inseminationin vitro fertilizationexternal ejaculation without copulation, or copulation shortly after ovulation.

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