Lack of sleep once in a while will not affect the development of the fetus, but long-term sleep deprivation will have adverse effects on the development of the fetus, such as may lead to retardation of fetal development, decreased resistance, and may even have the risk of miscarriage. Long-term sleep deprivation will affect the appetite and mood of pregnant women, and even cause hormonal disorders in the body, which will lead to insufficient nutritional intake of the fetus, resulting in delayed fetal development, decreased resistance, and increased risk of miscarriage. Therefore, pregnant women should have balanced nutrition, pay attention to rest and avoid staying up late in order to maintain sufficient sleep. If sleep deprivation is mild, it can be relieved by changing sleeping positions, listening to soothing music and taking a hot bath before going to bed. If long-term sleep deprivation is present, or is accompanied by headache and low mood, it should be treated under the guidance of a doctor.