How long does a pregnant woman lie flat before the fetus suffers from hypoxia?

Generally, doctors advise women to sleep on their left side during pregnancy, especially in the late stages of pregnancy. If a pregnant woman lies flat for a long time, it can easily lead to obstruction of blood flow in the lower limbs of the pregnant woman, causing chest tightness and shortness of breath, leading to fetal hypoxia in the uterine cavity. In the later stages of pregnancy, pregnant women are advised not to lie flat for more than half an hour, especially if they feel shortness of breath, numbness in their limbs after lying down, they need to change their position in time.

1. In fact, in the early stages of pregnancy, expectant mothers can lie flat and do not need to sleep on their left side. Before 12 weeks of pregnancy, the uterus has not exceeded the pelvis, so it is not easy to compress the large blood vessels behind the abdominal cavity, and it is not easy to compress the inferior vena cava, affecting the heart's return force, causing discomfort to the pregnant woman and fetal hypoxia. 2. Expectant mothers can sleep however they feel comfortable. In many cases, people sleep on their side without actively doing so. You can put a backrest on each side of the body so that it will be more comfortable to put your legs in when you sleep on your side. The baby will react if the posture is uncomfortable. You will naturally adjust it to a comfortable posture, so expectant mothers do not need to worry too much.

How should pregnant women lie down?

1. The main sleeping position for pregnant women is to sleep on the left side, which is beneficial to the fetus's oxygen production. It does not mean that pregnant women cannot lie flat on their back or on their right side. It can be adjusted appropriately to improve the body's comfort. Proper lying flat on the back or on the right side will not cause fetal intrauterine hypoxia and cerebral palsy.

2. Pregnant women should sleep on their left side from August to October. Because the inferior vena cava is located just to the right of the abdominal spine, if you lie on your right side, your enlarged uterus will not only compress the inferior vena cava, but the uterus will also rotate to the right to varying degrees, causing the blood vessels to stretch, thereby affecting the normal blood supply to the fetus. Pregnant women sleeping on their left side can correct the right rotation of the enlarged uterus, relieve the compression of the inferior vena cava by the uterus, improve blood circulation, increase the blood supply to the fetus, and be beneficial to the development of the fetus.

3. It is not suitable to lie flat in the late stage of pregnancy, otherwise you are prone to supine syndrome during pregnancy. When lying flat, the extremely large uterus will compress the inferior vena cava, which will reduce the heart return force and cardiac output, and cause hypotension. Pregnant women will feel dizzy, their eyes will turn black, they will feel panic, nausea, shortness of breath, and their faces will turn pale. Their pulses will become faster and deeper, their limbs will become weak, and they will sweat. This is called supine syndrome during pregnancy.

Therefore, in the early stages of pregnancy, pregnant mothers do not need to worry too much about how long the pregnant woman lies flat and the fetus suffers from hypoxia. But in the later stages of pregnancy, you need to be careful and lie down more often instead of lying flat on your back. Walk as much as possible to improve your physical fitness and promote the happy growth of your fetus. Pregnant women should pay attention to counting the fetal movements frequently so that they can understand the condition of the fetus in time.