Poor sleep during pregnancy is mainly due to the following reasons: 1, in the middle and late stages of pregnancy, as the fetus grows, it will lead to the patient’s bladder to be compressed, and the patient is prone to nocturnal urination at night, which leads to poor sleep. 2, mental and psychological stress during pregnancy is also prone to lead to low quality of sleep. 3, with the gradual growth of the fetus in pregnancy, there may be a lack of calcium, iron deficiency, The problem of malnutrition may cause discomfort and affect the patient’s sleep quality at night. 4. The increased level of progesterone in the body during pregnancy may cause the pregnant woman to be more sensitive than before, and there may be emotional fluctuations that may lead to sleep disorders.