After taking emergency contraceptive pills do not need special conditioning of the body, but should not be taken frequently, it is generally recommended that the number of oral emergency contraceptive pills not more than 3 times in a year. Emergency contraceptive pills are levonorgestrel tablets, mifepristone, etc., mainly through the inhibition of ovarian ovulation, change the endometrium to prevent the fertilization of the egg to impede the implantation of the egg, so that the cervical secretion viscosity increases to impede the penetration of sperm and so on to achieve the purpose of contraception. They need to be taken within 72 hours of unprotected intercourse to be effective. 1. Because all kinds of emergency contraceptive pills contain estrogen and progesterone, after taking the pills will lead to changes in the endocrine function of the ovary, causing abnormal bleeding in the uterus, the occasional use of once on the body is not much, do not need to be specially dealt with. 2. If long-term frequent use of emergency contraceptive pills will seriously affect the ovarian function leading to abnormal menstruation, serious may also lead to abnormal ovulation, affecting the normal function of pregnancy, it is not recommended to take emergency contraceptive pills for a long time. Taking emergency contraceptive pills if there are serious adverse reactions need to go to the hospital in a timely manner, do not blindly use their own medication.