After discontinuing dydrogesterone, it usually takes 3-5 days to get a period. Didroxyprogesterone is a progestin drug that, when entered into a woman’s body, can raise the level of progesterone. After stopping the drug, the progesterone level in a woman’s body will drop rapidly, at which time the endometrium will lose the protection of the hormone, and shedding will occur, and there will be the onset of menstruation. This usually happens 3-5 days after stopping the drug, of course, some people may take up to about seven days, these are not considered abnormal phenomena. If the menstruation does not come after 10 days of stopping the drug, it is more abnormal and the woman needs to go to the hospital for an ultrasound examination to see the condition of the endometrium.