Too much sex does not cause delayed menstruation. The regulation of menstruation is mainly influenced by the hypothalamic-pituitary-ovarian axis, the endocrine axis of reproduction, and there is normal ovulation in order to have a normal menstrual cycle. A normal menstrual cycle is characterized by regular vaginal bleeding at a specified time each month. The main reasons for delayed menstruation: 1. If you have normal sex, you should first rule out the possibility of pregnancy. Pregnancy can lead to menopause, whether it is an intrauterine pregnancy, an extrauterine pregnancy or a trophoblastic tumor caused by the pregnancy, all of which can lead to a history of menopause.2. If pregnancy can be ruled out, the main cause of delayed menstruation is due to endocrine disorders, the most common of which is abnormal uterine bleeding due to anovulation.