The contraceptive pill can affect the uterus, because the contraceptive mechanism of the pill is to inhibit the natural ovulation of the ovaries, so there is no egg in the case of intercourse will not form a fertilized egg, so there will be no pregnancy. It will also make the lining of the uterus thinner, and after thinning, it will prevent the fertilized egg from landing, so it can achieve the purpose of contraception, so it will have an impact on the lining of the uterus. Usually after taking short-acting contraceptive pills, the amount of menstruation will become less and less, and some people may even experience amenorrhea. Once amenorrhea occurs, pregnancy can be ruled out, and we can find out whether amenorrhea is due to other reasons. If there is no endocrine disruption, you can stop taking contraceptive pills to prevent pregnancy, and you can use other methods of preventing pregnancy, and your menstruation will resume after stopping the contraceptive pills.