Question

why does menstruation occur?​

Answer 1

actually every month an egg ovum is prepared inside the oviduct and if the ovum is not fertilized then it cause mansuration

Answer 2

Explanation:

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.

i hope it helps uu