The contraceptive mechanism of short-acting pills is to make the endometrium thinner and prevent the fertilized egg from being laid. Long-term use of short-acting pills for contraception will gradually thin the endometrium and lead to a decrease in menstrual flow, and some women may experience amenorrhea. Once amenorrhea occurs, it is recommended to stop using the pill, and most of them will resume normal menstruation in about two months after stopping the pill. In daily life, you can use condoms and intrauterine devices, which have relatively few side effects. If you want to take oral contraceptives, it may lead to menstrual disorders, irregular periods or corresponding side effects such as weight gain.