Pregnant women with fetal malposition can adopt the left side sleeping position, which is the most beneficial for both the pregnant woman and the fetus. The left-sided sleeping position will not burden the heart and can effectively correct the right rotation of the uterus, and many pregnant women with fetal malposition can get some improvement by sleeping on the left side. In addition, some pregnant women in late pregnancy, the lower limbs of pregnant mothers are prone to swelling, if you take the left side of the sleeping position can also help relieve the swelling of the lower limbs. Sleeping on the left side not only helps to relieve the fetal malposition, but also promotes the blood circulation of the uterus and placenta, which is conducive to the supply of oxygen and nutrients to the fetus and reduces the fetal oxygen deficiency. It can also relieve the varicose veins in the lower limbs of pregnant women and provide some relief to hemorrhoids during pregnancy.