Retrograde Menstruation Theory
Retrograde Menstruation Theory. According to this theory, endometrial cells could reach the. Retrograde menstruation (sometimes called reverse menstruation) is when some of the menstrual blood and tissue shed by the uterus during menstruation flows.
Retrograde menstruation is when your period flows upward through your fallopian tubes and into your pelvis instead of out your vagina. J halme , m g hammond , j f hulka , s g.