New MRI scans have shown why some pregnant women feel dizzy or faint when lying on their back in late pregnancy — and it’s not what doctors used to think.

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Supine hypotensive syndrome of pregnancy

Narrative Review

2022 Mar 1

New MRI scans of pregnant women have shown why lying on the back can cause low blood pressure, and this changes what doctors thought before. It’s like finding a new map that explains an old mystery.

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Supine hypotensive syndrome of pregnancy

Score: 1

DOI: 10.1097/EJA.0000000000001554

Similar Assertions

When a pregnant woman lies flat on her back in late pregnancy, it can lower her blood pressure, which might reduce blood flow to her and the baby. That’s why doctors tell her to lie on her side instead — it helps keep blood flowing properly.

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