After taking the emergency contraceptive pill, withdrawal bleeding usually occurs around 5-7 days, but not every woman will bleed every time she takes the pill, and this bleeding is not related to the success of the pill. The high level of estrogen and progesterone in the emergency contraceptive pills will affect the hormone level in the body, resulting in a temporary increase in the hormone level in the body. 5-7 days after taking the pills, the metabolism of the emergency contraceptive pills in the body is basically finished, and the estrogen level drops, so it will cause withdrawal bleeding from the endometrium. The bleeding caused by the emergency contraceptive pill usually lasts for a short period of time, and the amount of bleeding is relatively small in about 3 days, so it is not necessary to take hemostatic drugs for treatment. The hormone content of the emergency contraceptive pill is very high, so it is not recommended to take it frequently to avoid affecting the normal endocrine secretion.