As a rule, bleeding may occur for about five to seven days after taking the 72-hour emergency contraceptive pill. Generally speaking, after taking the emergency contraceptive pill, there may be withdrawal bleeding, this is a side effect of the drug, and the success of contraception is not directly related, and not every woman will have bleeding after taking the drug orally. Because of the high level of estrogen and progesterone in birth control pills, it can play a role in inhibiting the embryo’s implantation. This high level of hormones also affects the original hormone levels in the body, so it is possible that the change in hormone levels could cause bleeding. However, emergency contraceptive pills continue to bleed for a shorter period of time, and the amount of bleeding is relatively small, you can generally pay attention to cleanliness and hygiene, and do a good job of observation, if the patient takes emergency contraceptive pills after bleeding all the time, it is necessary to go to the hospital to find out the cause of the disease, so as not to delay the condition.