Sunday, December 13, 2009

Mucous, Menstruation Menstruation Question?

Menstruation Question? - mucous, menstruation

Please help me meet my brother works at the menstrual period.

1) Why a single egg leaves the ovary every month?
2) Why is the lining of the uterus in the development of a mature egg?
3) What happens to a mature egg is not fertilized?
4) What happens to the food, if fertilization does not occur,
5) The menses occurs only once a month and last 3-5 days. Why?

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