If fertilization of the egg and subsequent embryo implantation were to occur, the endometrium would not detach and menstruation would not occur. The end of the period is the beginning of a new menstrual cycle, in which the maturation of a new ovarian follicle occurs.
Menstruation: detachment of the endometrium
By Elena Izquierdo Trechera M.D., M.Sc. (gynecologist), Guillermo Quea Campos M.D. (gynecologist), Marta Barranquero Gómez B.Sc., M.Sc. (embryologist), Zaira Salvador B.Sc., M.Sc. (embryologist) and Michelle Lorraine Embleton B.Sc. Ph.D. (biochemist).
Last Update: 10/18/2023