tablet gestin (allylestrenol) contains natural progesterone which is given for 5 days to bring about withdrawal bleeding. you have not mentioned how long you have taken the drug. withdrawal bleeding usually occurs 48 hours after stopping the drug to up to 7 days. if you are still in that period then you should wait for your period to commence. if you are over that then i suggest you to do certain tests like transvaginal sonography tsh (thyroid stimulating hormone) and amh (anti-mullerian hormone testing). considering your age you could be in your perimenopause (stage nearing menopause) where menstrual irregularities are common. revert back after the tests to an obstetrician and gynaecologist online --> <link>
delayed periods even after taking gestin. what is the reason?