Hysteroscopy is usually done within 3-7 days after menstruation, and in some cases, it can also be done 1-2 days after menstruation. The time for hysteroscopy is usually as follows: 1. 3-7 days after menstruation: Hysteroscopy observes the uterine cavity, and if the endometrium is thicker, it may interfere with the observation. When the menstruation is just clean, the endometrium is relatively thin, which will reduce the interference of the examination, and at the same time, it is required not to have coitus after the menstruation is clean, which can reduce the chances of infection; 2, other time: some patients have less menstrual flow, suspected of uterine adhesion, and in line with the recent lack of coitus, to do other tests, such as routine blood, gynecological examination, no abnormality was found when the patient’s uterus endometrium itself is relatively thin, and it will not interfere with the examination, therefore, it does not necessarily have to be be done within 7 days, sometimes it can be done after 7 days of cleanliness. If the time for hysteroscopy is in conflict with the patient’s life and work schedule, the patient can consult with a medical professional to choose a suitable time.