The low milk of the first child will not have a greater relationship with the second child. Pregnant women should pay attention to a balanced diet, regular work and rest, and avoid exposure to harmful substances during pregnancy. 1. Balanced diet: Pregnant women should eat more fresh fruits and vegetables during pregnancy, and take appropriate vitamin and folic acid supplements to prevent the occurrence of fetal neural tube malformation. Pregnant women should also ensure adequate nutrition, because the growth and development of the fetus needs nutrients as raw materials. 2. Regular work and rest: pregnant women during pregnancy to develop a regular routine, early to bed and early to rise, avoid staying up late, but also appropriate exercise to enhance the body’s immunity. 3. Avoid contact with harmful substances: radiation, chemical substances and toxic gases may have a greater impact on the pregnant woman and the fetus, so pregnant women should try to stay away from these harmful substances. The fact that the first child has little milk does not mean that the second child will have the same problem. During pregnancy, pregnant women should eat a balanced diet, have a regular routine, avoid exposure to harmful substances, have regular checkups, and go to the hospital when problems are detected.