It is possible to get pregnant if you are breastfeeding and do not have a period, so it is recommended that women who are not planning to have children should use contraception when having sex. As lactating women’s body prolactin rises, may affect the secretion of progesterone, resulting in delayed menstruation, short-term amenorrhea and other symptoms, breastfeeding women in the absence of menstruation will not affect the state of ovulation, so it is possible to get pregnant when having sex. It is recommended that breastfeeding women who do not plan to have children should take safer contraceptive measures, such as condoms or intrauterine devices, etc. If the patient chooses to take contraceptive pills for contraception, she should stop breastfeeding immediately after taking the pills.