Question

what do u mean by mensturation

Answer 1

menstruation is a process in which the wall of uterus becomes thin and thick lining of blood along with some tissues shed of in every 28 or 29 days
thank you friends I hope it helped you

Answer 2

menstruation is a process in which a woman discharges blood and some other materials from the lining of uterus, once in about 21-45 days from her menarche to menopause. 

it occurs when ova dies without fertilization.