The pregnant woman sleeps and turns over frequently may be due to the increase in the size of the uterus during pregnancy and the increase in abdominal weight, which may affect the normal rest and development of the fetus, and even the risk of the umbilical cord around the neck. 1, affect the fetal rest: the fetus also has its own biological clock in the uterine cavity, and because of the growth and development needs, 90% of the day is in a sleep state, the pregnant woman turns over frequently will also make the fetus affected by the shaking, can not The fetus will be affected by the shaking and cannot sleep peacefully, affecting the quality of sleep; 2, affecting the development of the fetus: if the pregnant woman turns over frequently, the fetus will turn from deep sleep to light sleep, and the quality of sleep is low. And pregnant women frequently turn over, their own sleep state is not good, unfavorable to the development of the fetus; 3, increase the risk of umbilical cord bypass: the umbilical cord is the link between the pregnant woman and the fetus, to transport nutrition for the fetus, pregnant women frequently turn over will cause fluctuations in the amniotic fluid, the umbilical cord in the amniotic fluid in suspension, but increase the risk of fetal cord bypass, if serious instead of causing harm to the life of the fetus. It is recommended that pregnant women choose a comfortable position and reduce the number of turning over. When turning, pay attention to gentle movements, not as violent as before pregnancy, to minimize the degree of amniotic fluid shaking, to minimize the impact on the intrauterine.