The emergency contraceptive pill is a drug that contains high levels of hormones and is not recommended for use as a regular contraceptive because the hormones are more than N times that of regular birth control pills. Emergency contraceptive pills can inhibit ovulation when taken during the premenstrual period, and can impede bedtime and accelerate the shedding of the endometrium when taken during the late menstrual period. Because the emergency contraceptive pill inhibits and delays ovulation and inhibits the endometrium, it can delay the next menstrual period, and it is normal for it to be taken a week or so early. Most women’s menstrual cycles are disrupted after taking the emergency contraceptive pill. Some women experience early menstruation and some experience delayed menstruation, but statistically, the latter is the majority. As for the duration of postponement, it varies from person to person. So, how long is it normal to have a period after taking the emergency contraceptive pill? Emergency contraceptive pills can inhibit ovulation when taken in the premenstrual period, and can hinder bedtime and accelerate endometrial shedding when taken in the late menstrual period. Because of the inhibition and delay of ovulation and inhibition of the endometrium of the uterus, the emergency contraceptive pill can postpone the next menstruation, and it is normal to take the pill a week or so earlier. A, the harm of taking emergency contraceptive pills The emergency contraceptive pills currently on the market are safer and more effective compared to the traditional dosage. There have been no cases of contraceptive failure in the market so far, and the success rate of contraception is as high as 99.9%. Although the success rate is high, it is also extremely harmful. As the saying goes, “every pill is poisonous”, and this is especially true for emergency contraceptives. In addition to the common side effects such as nausea, vomiting, headache, dizziness, fatigue, breast swelling, bleeding, and delayed menstruation, the pill can also be harmful. Since the dose of emergency contraceptive pills is more than ten times that of regular contraceptive pills, large doses are used to interfere with the function of the ovaries and control ovulation, thus causing harm to the ovarian function, the metabolism of the liver and kidneys and other systems of women, and this harm is sometimes even difficult to estimate. Frequent use of emergency contraceptive pills can also lead to female endocrine disorders, affecting the normal function of the reproductive system, but also cause menstrual disorders, even if you choose, it is best not to exceed 3 times a year. Second, after taking the emergency contraceptive pill pregnancy how to do the emergence of the emergency contraceptive pill, to the contraceptive pill failure people exempted a lot of trouble. But sometimes things can happen, and what is the matter if you get pregnant after taking the emergency pill? What should I do? The main principle of the emergency contraceptive pill is to interfere with the hormonal balance of the body in a single large dose to achieve the purpose of contraception afterwards. It must be taken within 72 hours after the event, and the earlier it is taken, the better it is, with an efficiency rate of 99%. If the effectiveness is so high, why did it still fail? It is possible that the time to take the pill is too late for 72 hours, or it may be close to 72 hours, so it is a little late. There is also the question of whether the drug has expired without being detected, thus causing the contraceptive to fail. If there is no abdominal pain, bleeding and other symptoms of preterm abortion, suggesting that the drug has no effect on the fetus, healthy development, the child can be retained. Data show that most pregnancies after taking the emergency contraceptive pill after intercourse have no effect on the child, so there is no need to worry too much. However, to be on the safe side, it is necessary to do all kinds of screening tests during pregnancy.