What if induction of menses fails?
If using progesterone or progestin (Provera, Aygestin, and Cycrin) after a negative pregnancy test fails to induce menstruation, one should have a second pregnancy test before further treatment. It may be that the lining was not thick enough to shed, in which case using estrogen followed by progesterone/progestin, or birth control pills, may work for bringing on a period.
