Taking emergency contraceptive pills after ovulation may inhibit the growth of the uterine lining. Emergency contraceptive pills are mainly used to achieve contraception by inhibiting ovarian ovulation and contain large doses of progesterone, which, when taken, can cause the cervical mucus to thicken, which is not conducive to the passage of sperm, thus preventing the formation of a fertilized egg. However, progesterone will thin the endometrium, thus inhibiting the growth of the endometrium. Taking emergency contraceptive pills will have certain side effects on the body, which will lead to endocrine disorders, menstrual cycle disorders and other phenomena in women, and long-term use of contraceptive pills may lead to amenorrhea and infertility. The use of the pill should also be noted that known cases of pregnancy can not be taken. It is recommended that women who are sexually active should choose safe contraceptive measures, and contraceptive pills should be used under the guidance of a doctor to avoid unauthorized use. If the uterine lining grows abnormally, you need to go to the hospital in time for treatment.