The progesterone is generally eaten for a few days without a period, depending on the specific reasons, should be a specific analysis of the problem, not a generalization. Progesterone is a progestin, mainly used to calm the fetus, promote menstruation and regulate menstruation. The cyclical shedding and repair of the endometrial lining is caused by the cyclical stimulation of estrogen and progesterone. If the body does not come to menstruation due to lack of progesterone, taking progesterone at this time will cause the level of progesterone in the body to rise. Progesterone is taken continuously for 3-5 days to make the endometrium reach sufficient thickness, and after stopping the drug, the endometrium is not maintained by hormones, at which time the endometrium will shed, thus forming menstruation. If there are organic changes in the uterus and adnexa, progesterone cannot treat the lesions at this time, so no matter how long you take progesterone, it has no effect. If the delay is too long, it is advisable to consult a gynecologist as soon as possible to find out the reason for not having a period, and not to blindly take progesterone to promote menstruation. During the medication period, eat less cold food, maintain a good routine and keep a happy mood.