why does menstruation occur?
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Explanation:
A period happens because of changes in hormones in the body. Hormones are chemical messengers. The ovaries release the female hormones estrogen and progesterone . These hormones cause the lining of the uterus (or womb) to build up.
Answered by
1
Explanation:
Menstruation occurs because during this period the wall of uterus becomes thick to receive the egg. In case it is fertilised and developed this results in pregnancy.
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