Question

why does menstruation occur​

Answer 1

Answer:

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.

Explanation:

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Answer 2

Answer:

A period happens because of the changes in the hormons in our body. Hormons are chemical Messengers. The ovaries release the female hormons estrogen and progesterone. These cause the lining of the uterus or womb to build up.