Emergency contraceptive pills are hormonal drugs that have an effect on breastfeeding, so they cannot be taken during breastfeeding. Emergency contraceptive pills are compound preparations of estrogen and progesterone, which are hormonal drugs that can be passed on to the baby through breast milk, thus affecting the baby’s health, and at the same time can cause a decrease in the secretion of breast milk, so emergency contraceptive pills are not allowed to be taken orally during the breastfeeding period, and its contraceptive success rate is low, and it is recommended that non-breastfeeding women avoid using it as much as possible. Breastfeeding women are generally advised to use condoms and other contraceptives, which are safe and have fewer side effects. Emergency contraceptive pills are often used as an afterthought without safety measures, and repeated application can lead to endocrine disruption, resulting in delayed menstruation, irregular menstruation, amenorrhea, infertility, etc. Scientific contraception is recommended.