Pregnancy 30 weeks try not to take the right side of the sleeping position, it is recommended to take the left side of the sleeping position, while avoiding supine sleeping position. 30 weeks of pregnancy already belongs to the late pregnancy, the fetus gradually mature, at this time the uterus will be right-handed, if you use the right side of the sleeping position will be compressed to the abdominal aorta, resulting in poor blood circulation, affecting the blood supply of the fetus, thus ischemia and hypoxia, and in serious cases the fetus may be intrauterine asphyxia. At the same time, sleeping on the right side will also compress the inferior vena cava of pregnant women, reducing blood circulation in the lower extremities and making them vulnerable to venous thrombosis, so it is not recommended for pregnant women to sleep on the right side. It is recommended that it is best to use the left side of the bed, which can offset the compression of the blood vessels by the right rotation of the uterus and make the blood flow in the uterus, which is conducive to the growth and development of the fetus, and can also avoid gestational hypertension in late pregnancy. In addition, try to avoid supine sleeping position, this sleeping position will also cause hypoxia, but also prone to prone to prone to hypotension, placental abruption, fetal distress and other complications. In late pregnancy, people should pay attention to sleep to prevent cold and warmth, prevent stifling heat, etc. Usually rest more, appropriate activities, maintain a healthy mental state, avoid too excited or too tired, and seek medical attention in time if you feel unwell.