Breastfeeding with emergency contraceptive pills can be temporarily observed under the guidance of a doctor. Taking emergency contraceptive pills is a remedy after sex without contraception, if taken during breastfeeding, the drug will be metabolized by breast milk, so it is not recommended for breastfeeding women. Due to the high dose of hormones of emergency contraceptive pills, when breastfeeding after taking and breastfeeding, it can cause vaginal bleeding symptoms of female infants, you can go to the hospital and keep the vulva clean, most will disappear on their own, but also suspend breastfeeding for 3 days. Breastfeeding will affect the time of menstruation resumption, or may not have menstruation during breastfeeding. However, since the ovaries have resumed ovulation, contraceptive measures should be taken during breastfeeding, and it is recommended to take instrumental contraception, such as condom, IUD placement, etc. Medication contraception is not recommended, so as not to affect the growth and development of the baby.