Pregnant individuals are advised not to lie on their back due to possible vena cava compression, affecting blood flow and circulation.
The reason why people say it's better not to lie on your back during pregnancy is because when you lie on your back, your uterus can compress your vena cava. This compression can impede the flow of blood returning to your heart, potentially causing a decrease in blood pressure and circulation. This is why it's recommended for pregnant individuals to sleep on their side to avoid this issue.
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