If a woman has a regular menstrual cycle and has normal sex, and her period is delayed for a week, she should first consider whether she is pregnant. Especially if the menstrual period is delayed for more than 10 days, an early pregnancy test can be done first to rule out the possibility of pregnancy. After that, consider whether there are organic lesions of the reproductive system, for example, after the operation of the uterine cavity, this phenomenon may be caused by intraoperative damage to the endometrium, resulting in adhesions in the uterine cavity. Other women do not have organic lesions of the reproductive system, but the function of the gonadal axis is abnormal, such as excessive stress, emotional instability, etc., which inhibits ovulation and can also cause delayed menstruation. Some women have high levels of estrogen, causing abnormal proliferation of the endometrium, which cannot be stripped off, and this can also occur.