>specifically because withdrawal bleeding would reassure the women that they weren't pregnant. It would also be an additional thing you'd have to prove was saf

>specifically because withdrawal bleeding would reassure the women that they weren't pregnant. It would also be an additional thing you'd have to prove was safe and effective. Menstruation is a natural process and it would have been reasonable to assume that it was necessary for long term reproductive health. Turns out that's not the case, but we only know that because of additional studies.