Question: what the difference between menstruation cycle and menstruation?
Answer: Uterus: Menstruation Each menstrual cycle starts with menstruation (the period). A period is the normal shedding of blood and endometrium (the lining of the uterus) through the cervix and vagina. A normal period may last up to 8 days (1), but on average lasts about 5 or 6 (4).