Staying up all night during pregnancy may lead to delayed fetal development, fetal hypoxia, may have an impact on fetal intelligence, and in severe cases, premature labor or premature abortion may occur, so you should avoid staying up all night. Pregnant women need to face the growth of the fetus in a sufficient and complete state during pregnancy, and staying up late for a long period of time may have an impact on the pregnant woman herself, leading to emotional instability, lowering her immunity, metabolism, and increasing the stress of pregnancy, which in turn leads to emotional instability, physical weakness, and so on. For the fetus, long-term late night will affect the blood supply and oxygen supply, ischemia and hypoxia may cause developmental delays in the fetus, at the same time, it will affect the absorption of nutrients, malnutrition, and in severe cases even due to ischemia and hypoxia, a priori miscarriage, a priori preterm labor. Therefore, pregnant women need to rest during pregnancy, ensure adequate nutrition and energy supply, moderate activity, increase water intake, with a full mood and healthy body to meet the birth of a new life.