Before answering this question, let’s understand what is meant by the emergency contraceptive pill? The main ingredient of the emergency contraceptive pill is the progestin levonorgestrel (such as the well-known Yutin). These pills work by suppressing ovulation, preventing sperm from joining the egg, and preventing the fertilized egg from settling in the uterus. People who get pregnant even after taking Yutin often suspect that they may have taken a fake pill, how can they still get pregnant after taking the pill? In fact, the success rate of these pills is not 100%, but around 80%, so there is still a 20% chance that a woman will get pregnant after taking these pills. If the pill does not succeed in suppressing ovulation, in preventing the union of sperm and egg, or in preventing the fertilized egg from being laid in the uterus, then, according to the “all or nothing” theory of early pregnancy, the baby conceived in this case can be kept if it is not aborted. This theory sends a message to us: if you are not explicitly taking drugs that are prohibited during pregnancy, do not take the decision to terminate the pregnancy lightly, but let nature take its course and wait and see what happens. This is because even if there is concern in case there is something wrong, it can be subsequently ruled out by means of medical detoxification tests. Nowadays, obstetric testing is quite sophisticated and can monitor fetal development through B-ultrasound, amniocentesis and various other tests. It is not too late to terminate the pregnancy in case any problem is detected in the fetus.