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When does menstruation happen?
A. when the egg meets the sperm.
B. if the egg is not fertilized.
C. if the egg is fertilized.
D. when the egg is released from the ovary.


Sagot :

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  1. D. when the egg is released from the ovary

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Answer:

B. if the egg is not fertilized

Explanation:

Menstruation occurs when an egg cell is not fertilized by a sperm from the aproximately 28 days cycle.  If not fertilized, the egg is passed from the reproductive tract during menstrual bleeding, which starts about two weeks after ovulation.

hope it helps