Pregnant women should avoid drinking coffee for the following reasons: 1, affect sleep: pregnant women need to ensure adequate sleep during pregnancy to ensure the growth and development of the fetus. Coffee contains a certain amount of caffeine, which can stimulate nerve excitement, pregnant women drink a lot of coffee, there will be a decline in sleep quality and even insomnia and other symptoms, but also stimulate the fetus resulting in frequent fetal movements; 2, stimulate the stomach: pregnant women in early pregnancy due to the role of estrogen, nausea, vomiting and other early pregnancy reaction, at this time, drinking coffee, the acid will stimulate the gastric mucosa, which is not conducive to the relief of early pregnancy reaction. 3, affect the absorption of calcium: pregnant women need a lot of calcium during pregnancy to prevent their own bone loss and promote the development of fetal bones and teeth. The coffee contains tannins, which will prevent the body’s absorption of calcium ions, which is not conducive to calcium supplementation for pregnant women. To sum up, pregnant women should avoid coffee during pregnancy. In addition, strong tea and carbonated drinks are also not recommended. During pregnancy, it is also necessary to have a balanced diet, consume protein-rich foods, as well as fruits and vegetables rich in vitamin C and trace elements, pay attention to the intake of carbohydrates, and a balanced diet can promote the healthy growth of the baby.