After hysteroscopy and diagnostic curettage, menstruation will come about 1 month after curettage. Individuals are different, some people may have their menstruation a few days earlier or a few days later, which are all normal phenomena. The functional layer of the uterus is scraped off after curettage, and it takes about 1 month to enter the proliferative phase, the ovulatory phase and then the secretory phase for changes to occur, so you will have your period in about 1 month. If more than 40 days and still no menstruation, we should pay attention to it, because clinically it may be due to the damage of the endometrium, clinically caused by the uterine cavity adhesion, so caused by amenorrhea, timely to the hospital to do the appropriate examination to understand what causes amenorrhea, if necessary, clinically should be given the appropriate treatment.