The main harmful effects of taking emergency contraceptive pills on breastfeeding are the inhibition of milk production as well as the effects on the baby’s health. 1 inhibit milk secretion. Emergency contraceptive pills contain a large number of hormone components, after taking the drug will lead to hormone level disorders in the body, which will inhibit the normal secretion of breast milk, resulting in a decrease in the amount of milk. 2. Affect the health of the baby. Emergency contraceptive pills contain a large number of estrogen, mothers taking emergency contraceptive pills during breastfeeding and then breastfeeding, the drug components will be passed through the milk to the baby, which may lead to breast development of male babies, or female babies vaginal epithelial hyperplasia, labia hypertrophy and other abnormalities, jeopardizing the baby’s health and development. During breastfeeding, it is generally recommended not to take contraceptive pills at will, but to take methods of contraception such as wearing a ring or a male condom. If you have to take emergency contraceptive pills, it is recommended to suspend breastfeeding for 3 days after taking the pills, and then breastfeed again after the drug is metabolized.