Normal menstruation is the monthly cycle of blood loss per vagina, resulting from the breakdown of the uterine lining when implantation of a fertilised ovum does not occur. Menstruation is not a sign of ovulation but of the fact that the hormonal controls and the reproductive tract's responses to it work. The female reproductive system consists of the ovaries, Fallopian tubes, uterus, vagina and the vulva.
This is a companion discussion topic for the original article at https://patient.info/doctor/gynaecology/menstruation-and-its-disorders