Taking emergency contraceptive pills one month after painless abortion may affect the menstrual cycle, irregular bleeding or delayed absence of menstruation and so on. Emergency contraceptive pills contain a large number of progesterone components, such as painless abortion one month after the menstrual period, and then took emergency contraceptive pills may lead to increased levels of hormones in the body, the endometrium abnormally thickened, after stopping the drug hormone levels will decline retreat bleeding phenomenon, usually lasts for 3 to 5 days will disappear on their own. If you take emergency contraceptive pills one month after the painless abortion before the restoration of menstruation, because the drug will inhibit ovulation, may make the ovary cycle secretion of estrogen and progesterone disorders, which will affect the situation of menstruation after the abortion, the phenomenon of delayed menstruation. Painless abortion one month took emergency contraceptive pills may also cause nausea, vomiting and other gastrointestinal discomfort reaction, emergency contraceptive pills side effects are very large, occasionally take a small impact, frequent use will inhibit ovulation, resulting in infertility. It is recommended to do a good job of reasonable contraceptive measures, do not often take emergency contraceptive pills.