Sperm from the semen enters the woman’s uterine cavity and reaches the fallopian tube area where it meets with an egg to form a fertilized egg, which is a prerequisite for pregnancy. If there is no ejaculation after intercourse and no sperm enters the woman’s reproductive tract there is no possibility of pregnancy and there is no point in taking the pill. If the pill is taken in this situation, the possible reaction is not very different from taking the pill after normal ejaculation. Some patients may have spotty vaginal bleeding or more obvious withdrawal bleeding about 3-5 days after taking the pill. This is bleeding caused by the withdrawal effect of progesterone in the emergency contraceptive pill on the uterine lining, which is a normal reaction after taking the emergency contraceptive pill. Some women may experience dizziness, nausea, abdominal pain and other symptoms after taking emergency contraceptive pills, and these symptoms will disappear within 24 hours.