When they pass through the internal vaginal orifice, large clots may cause cramps.
Read the full article on: Why do blood clots occur during menstruation? ( 84).
By Andrea Rodrigo B.Sc., M.Sc. (embryologist), Júlia Roig Navarro M.D. (gynecologist), Silvia Azaña Gutiérrez B.Sc., M.Sc. (embryologist) and Cristina Algarra Goosman B.Sc., M.Sc. (psychologist).
Last Update: 08/28/2015