What is the recommended position for pregnant women to prevent supine hypotensive syndrome?

The left lateral position is recommended for pregnant women to prevent supine hypotensive syndrome because it helps optimize blood flow to the uterus and the fetus. In this position, the weight of the uterus is shifted away from the inferior vena cava, which is a large vein that carries blood from the lower body back to the heart. When a pregnant woman lies on her back (supine position), the heavy uterus can compress the inferior vena cava, leading to decreased venous return, lowered cardiac output, and subsequent hypotension (low blood pressure) that can result in dizziness and potential harm to both mother and baby.

The left lateral position not only enhances circulation but also alleviates pressure on other vital organs, supporting better oxygenation and nutrient delivery to the fetus. While the right lateral position can also provide some benefit, the left lateral position is generally preferred due to the anatomical location of the inferior vena cava, making it the most effective for preventing this complication during pregnancy. The seated position is not as effective for addressing the specific risk factors associated with supine hypotensive syndrome and does not provide the same level of benefit as the lateral positioning.