Emergency contraceptive pills during breastfeeding can have adverse effects on the growth and development of the baby because they contain estrogen and progestin, which can enter the baby’s body through the breast milk and cause adverse effects on growth and urinary system problems. As far as possible, it is better to take emergency contraceptive pills orally for 48 hours or 72 hours afterwards, so that breastfeeding can be done without interruption. In the future, if you have intercourse during breastfeeding, you need to use condoms to avoid taking too many emergency contraceptives, which can also cause irregular menstruation and abnormal bleeding.