Question

what is meant by menstruation why does it take place how does long does this process last​

Answer 1

Answer:

In case of egg cells is not fertilised, the thick uterus lining breaks down leading to bleeding. This is called menstruation or periods.

Menstruation occurs every 28 day because ovulation occurs in every 28 days.

Answer 2

Answer:

Menstruation is the period for girl that occur monthly for the regular discharge of blood and mucosal tissue from the inner loning of the uterus through the vagina.