https://www.youtube.com/watch?v=YJ2dZE_i6mQ But seriously, a “period” is the 3–7 days when a woman's uterus sheds its lining and the blood and other substances come out of her vagina. read more
The menstrual cycle on the other hand is the entire 28 day cycle that repeats over and over again, unless the woman is pregnant, has already experienced menopause, or uses the birth control pill. Every day of a woman’s life is part of the menstrual cycle. read more
A period, or menstruation, is the shedding of the lining of the womb. Menstruation is also known as menses. Menses are part of normal sexual health for women during their reproductive years. Menstruation that includes bleeding from the vagina is found mainly among humans and similar animals, such as primates. read more
Menstrual synchrony is a theory that women who live near each other or spend a lot of time together will start to see their cycles sync up so that they get their periods around the same time. read more