The seriousness of not having a period after taking dextroprogesterone needs to be assessed based on the time of observation and further examination to see if there are any conditions that cause menstruation to stop, and so on. Dydrogesterone is mainly used to treat diseases caused by endogenous progesterone deficiency, such as dysmenorrhea, endometriosis, etc. Menstruation usually does not occur while taking dydrogesterone, and it usually takes 3 to 7 days after stopping the drug. If menstruation does not occur for more than ten days, then you need to go to the hospital for further examination to check whether there is any organic pathology due to uterine dysplasia, endometrial damage, etc., or whether menstruation stops due to estrogen insufficiency, pituitary tumors and other diseases. Don’t be overly nervous until the cause is clear, keep a good and happy mood, have a regular routine, avoid staying up late and reduce stimulating foods to avoid affecting menstruation, and treat the cause of menstruation after the examination.