What should i do if secondary amenorrhea?

Progesterone: Provera (medroxyprogesterone) is synthetic Progesterone the 2nd of two female hormones with estrogen being the other. Provera (medroxyprogesterone) is given to secondary amenorrhea patients to elicit withdrawal bleeding(period). It also helps to reduce the risk of endometrial hyperplasia/cancer in pcos and obese 40+ hypertensive patients at risk.

See a GYN for tests: If your brain isn't signalling for an egg release from your ovary, you won't have a signal for your periods either; that's usually the cause of amenorrhea. Often it's a hormonal imbalance--Thyroid, Prolactin, LH, FSH, Hcg should be checked. Your doctor can also induce a period as well w/ OCPs. If you've NEVER had a period, you should get an US to make sure you have normal uterus/vagina/ovaries.

Lack of periods..: Anytime after you had periods as teenager. Most common cause is pregnancy!