Daily coitus does not affect the delay of menstruation under normal circumstances, but if daily coitus without contraception, resulting in pregnancy, this situation will lead to delayed menstruation. In addition, irregular menstruation and delayed menstruation are related to many factors, such as overwork, depression, stress, excessive weight loss, rest, sleep and other conditions can affect the delayed menstruation. In addition, women taking some drugs, as well as inflammation of the reproductive tract, etc., also have an impact on the delayed menstruation, but in the case of daily coitus, the main thing is to find out whether the pregnancy affects the delayed menstruation, from the point of view of the health of the doctor recommended not to daily coitus.