Why is it recommended to position a pregnant woman on her left side?

Positioning a pregnant woman on her left side is recommended primarily to reduce the pressure of the fetus on maternal circulation. This position facilitates improved blood flow and reduces the risk of the uterus compressing the inferior vena cava, which can lead to compromised blood return to the heart and reduced cardiac output. By alleviating pressure on major blood vessels, positioning the mother on her left side helps stabilize her hemodynamics and ensures that both the mother and fetus are getting adequate oxygen and nutrients during pregnancy.

This left lateral position is particularly important in the later stages of pregnancy when the expanding uterus can potentially obstruct blood flow when the mother is lying flat or on her back. Thus, positioning the mother on her left side is a critical practice for safeguarding maternal and fetal health during emergencies or labor.