Where does fertilization occur in ampulla?

Following ovulation, the ovum with its cumulus oophorus cells are picked up by the fimbria of the fallopian tube. The ovum has now formed the first polar body. It remains in the ampulla portion of the tube and is viable for about 18 to 24 hours. If fertilization does not occur, the ovum disintegrates and is destroyed by the tube. Sperm will remain viable in the female reproductive tract for about 48 hours, although this can be quite variable. Sperm present in the ampulla meet the cumulus oophorus mass and penetrate by chemical and mechanical means to reach the zona pellucida. One sperm penetrates the zona pellucida, the second polar body is formed, and the nuclear material of the sperm enters the vitelline membrane. The diploid chromosome number is re-established, and mitotic cell division can now occur.

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Which course are u looking

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