Mid-pregnancy once in a while on the table to sleep on the impact is not big, but usually it is best not to sleep on the stomach. In the middle and late stages of pregnancy because the fetus and the uterus increase in size, it is best not to sleep on your stomach, it is easy to press the fetus. If only once in a while to sleep on the table, after waking up did not feel uncomfortable stomach, generally no problem. If the pregnant woman sleeps on her stomach after waking up feeling uncomfortable or fetal movement is particularly frequent, you need to consider whether the fetus is affected, you need to go to the hospital in time to do ultrasound and fetal heart monitoring and other checks. It is recommended to sleep on the left side of the bed in the middle and late stages of pregnancy, and count the fetal movement every day, once the fetal movement is abnormal, you need to go to the hospital for examination.