In the fourth month of pregnancy, you can sleep flat on your back.
The fourth month of pregnancy belongs to the middle stage of pregnancy, the uterus enlargement is not particularly obvious, when you sleep flat on your back will not press the fetus, so you can sleep flat on your back.
In the early and middle stages of pregnancy, the fetus is relatively small at this stage, and pregnant women can choose their own comfortable sleeping position without any special restrictions.
However, for patients who have experienced supine hypotension, it is recommended to rest in the side-lying position to reduce the chance of supine hypotension. As the duration of pregnancy increases, it is generally not recommended to sleep flat on your back in late pregnancy, when the fetus develops faster and the uterus enlarges significantly, sleeping flat on your back may compress the inferior vena cava, which affects the blood circulation at the heart, causing pregnant women to experience symptoms such as panic attacks, dizziness, etc. Therefore, it is recommended to choose the side-lying position in late pregnancy.
Therefore, it is recommended to choose the side lying position in late pregnancy.