Format: Windows Media Player If the video does not play, you may need to download and install the latest version of the Media Player plug-in. Download Plug-in Every month an egg is released from the ovary during ovulation. It travels down the fallopian tube, where it may be fertilized by a sperm. If fertilized, it implants in the lining of the uterus. If not, the egg and lining are shed during menstruation.

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Updated: 12/13/2007