Pregnant women’s sleeping position and pregnancy time has a certain relationship: first, if in the early stages of pregnancy do not have to care too much about sleeping position, you can take flat or side lying, it is best not to sleep on your back, because the early pregnancy fetus is still relatively small, sleeping position basically will not have an impact on the body of the fetus, you can choose a sleeping position suitable for you, to comfort. Second, in late pregnancy when the fetus is relatively large, pay attention to choose the right sleeping position, late pregnancy, the uterus will be in a right-handed state, with the increase of the month will produce pressure on the inferior vena cava, it is best to take the left side of the position to sleep, the left side of the sleeping pressure on the inferior vena cava is relatively small, so as to avoid hypoxia. If you often take the right side to sleep, it may lead to fetal hypoxia, affecting the normal growth and development of the fetus.