Sleeping position in pregnancy to comfortable as the main principle, how comfortable how to sleep, but different pregnancy sleeping position may be different, usually divided into the following stages: 1, early pregnancy: pregnant women’s belly has not yet bulged or bulge is not obvious, the fetus is small, sleeping position relative to the late pregnancy is more casual, supine, side lying can be, but do not sleep on their stomachs, so as not to abdominal pressure; 2, in pregnancy, late pregnancy: it is recommended that you can use the left The lateral position can help relieve the pressure brought by the enlarged uterus, help the pelvic and lower limb blood circulation, increase the blood supply to the fetus, to prevent the occurrence of supine hypotension syndrome, so it is the most suitable sleeping position for pregnant women. Because the right-sided or supine position will compress the inferior vena cava, causing a reduction in blood return and thus hypotension, as well as edema in the lower limbs of pregnant women. At this time, try not to take the supine and prone positions to avoid squeezing the fetus. In addition, if a pregnant woman has too much amniotic fluid or is pregnant with twin babies, if she feels heavy and swollen in her lower limbs while sleeping in a side-lying position, she can use a loose pillow to elevate her calves and feet to reduce the edema and discomfort in her lower limbs. It is recommended to gradually correct the sleeping position in early pregnancy and slowly get used to sleeping in the left side position.