Whether it is long-acting contraceptives, short-acting contraceptives, or emergency contraceptives, there may be a delay in menstruation in the clinic, because the side effects of contraceptives mainly lead to disorders of menstruation, and there will be irregular vaginal bleeding, and during the period of taking contraceptives, it may lead to a delay in menstruation. If clinically taking short-acting contraceptives for a long time, it will make the uterine lining atrophy, which clinically will lead to a decrease in the amount of menstruation, and even the possibility of amenorrhea, which is mainly due to short-acting contraceptives side effects. It is recommended that if this situation occurs, the contraceptive pill can be discontinued, given observation, after the resumption of menstruation, clinical advice can be changed to other methods of contraception.