Women can have normal sex during the postpartum period when they are breastfeeding, as long as their reproductive system returns to normal. However, during breastfeeding, due to the hormone levels in the body, lactogen is elevated and there is a risk of amenorrhea or irregular menstruation during breastfeeding, but attention should also be paid to contraception. The uterus is enlarged and softened during breastfeeding and irregular menstruation does not mean that no follicles are discharged, so strict contraception should also be used when sex occurs. Generally, the use of IUDs or oral contraceptives is not suitable during breastfeeding, and the most suitable form of contraception during breastfeeding is the use of condoms, or in vitro ejaculation. In addition, if you experience delayed menstruation or early pregnancy after having sex while breastfeeding, you should promptly rule out the possibility of early pregnancy. If you have an unplanned pregnancy while breastfeeding, the most suitable is medical abortion.