After breastfeeding pregnancy, due to the effect of progesterone, the milk will slowly decrease, usually about 3 months will run out of milk. It is not recommended to continue breastfeeding after pregnancy because the quality of milk is gradually decreasing and the fetus in the womb also needs a lot of nutrition, so breast milk at this time is not enough to meet the needs of the baby’s growth and development. The hormone level in the body will change when you are pregnant, and your milk will be reduced, so it is recommended to feed your baby with milk powder or complementary food. Generally breastfeeding should do a good job of strict contraceptive measures, because if breastfeeding leads to unintended pregnancy, prone to the following hazards: 1, breastfeeding women’s body organs and tissues have not fully recovered, after pregnancy embryo in the uterus bed, and the uterus old injuries have not healed, will cause damage to women’s uterus recovery, but also easy to cause the birth of the accident; 2, breastfeeding women’s body nutrition is not enough to bear the needs of pregnancy, at this time 2, lactating women’s body nutrition is not enough to bear the needs of pregnancy, at this time pregnancy may cause malnutrition of the fetus, but also easily lead to female body weakness, resistance to decline, increasing the risk of postpartum bleeding and infection of the fetus and pregnant women; 3, caesarean section women’s uterine wall wound is difficult to heal within a short time, if pregnant during lactation, as the fetus gradually grows, it is easy to stretch the uterine wall to the ambassador thinning, the surgical wound of the uterine wall in the middle or late pregnancy is easy to cause hemorrhage of pregnant women, which is harmful to the fetus and pregnant women. The surgical wound of the uterine wall in the middle or late pregnancy can easily cause heavy bleeding of the pregnant woman, which is harmful to the fetus and pregnant woman. Therefore, if you are pregnant while breastfeeding, you should pay more attention to it and go to your local hospital to consult whether it is suitable to continue the pregnancy and then deal with it accordingly.