Some people want a baby and look forward to getting pregnant all day long, but it is difficult to get pregnant, and sometimes they even have to take medication to treat infertility, and the baby doesn’t come for a long time; while some people don’t want a baby, but they can’t stop the baby from coming even after taking the emergency contraceptive pill. In clinical practice, there are often women who take the emergency contraceptive pill after intercourse and still end up pregnant, so can they have the baby? Before answering this question, it is important to understand what the emergency contraceptive pill is. The main component of the emergency contraceptive pill is the progestin levonorgestrel (such as the well-known Yutin). These pills work by inhibiting ovulation, preventing the union of sperm and egg, and preventing the fertilized egg from being laid in the uterus. Its usage is to take one tablet (0.75 mg) as soon as possible within 72 hours after intercourse, and the second tablet 12 hours later; or two tablets (1.5 mg) together, there are already 1.5 mg of emergency contraceptive pills on the market, such as gold Yutin, which can be taken once. If vomiting occurs within two hours after taking it, you should take a refill immediately. This type of medication affects pregnancy by inhibiting ovulation and affecting the lining of the uterus, which is also out of sync with ovulation. If the medications taken do not successfully inhibit ovulation, prevent the union of sperm and egg, or intercept the fertilized egg from being laid in the uterus, then according to the “all or nothing” theory of early pregnancy mentioned above, the baby conceived in this case can be kept if it is not aborted. Will the metabolites of progesterone affect the fetus? If you take the emergency contraceptive pill on the 10th-20th day of the menstrual cycle, even if you are pregnant, the formation of the blood exchange between the embryo and the mother will be around 35 days after conception (here we are referring to the menstrual cycle of 28-30, the menstrual cycle is irregular, that is calculated separately), there are at least 10-15 days between taking the pill and the formation of the blood exchange, at this time the emergency contraceptive pill is basically metabolized completely and will not affect the fetus. The emergency contraceptive pill is a simple pill. Emergency contraceptive pills are composed of progestin alone, and progesterone hormones taken during pregnancy can mainly lead to fetal reproductive system dysplasia, which may result in fetal hermaphroditism. However, if the pill is taken after 30 days of the menstrual cycle, during the metabolism of the emergency contraceptive pill, the maternal-fetal cycle has begun to be established, which may lead to hermaphroditism. Therefore, if the emergency contraceptive pill is taken on the 30th day of the cycle or later, but further consultation with a gynecologist is required.