Question

why does menstruation occur

Answer 1

The menstrual cycle occurs due to the rise and fall of hormones. This cycle results in the thickening of the lining of the uterus, and the growth of an egg, (which is required for pregnancy). ... If pregnancy does not occur, the lining is released in what is known as menstruation.

Answer 2

Hiiii

Answer....

In each ovulation cycle, an egg is released from the ovary which is transferred to the fallopian tube. Additionally, the uterus prepares itself for a possible pregnancy. The lining of uterus thickens. When no conception happens, the lining of the uterus is shed in fragments; along with the unfertilized egg. These things are released out through the vagina in the form of bleeding; called menstruation.

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