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Moms advise sleeping on your side rather than your back in the third trimester, since prolonged back-lying can reduce oxygen supply to the baby - though brief periods on your back are fine.
Moms who find back-sleeping most comfortable worry they may be unknowingly harming the baby. The community reassures that short stretches on the back (as happens during scans) are fine, while advising side-sleeping overnight - made easier with a maternity pillow - to keep the baby's oxygen supply unobstructed.
Here's what moms in our community shared based on their own experience.
Sleep on your sides; lying on the back isn't safe and sideways gives more room to the baby.
Lying on your back for 10-15 minutes doesn't hurt (you'll be on your back during scans), but don't lie on your back overnight as it can block oxygen supply to the baby. A long maternity pillow helps you stay on your side.
The information shared on this page comes from real experiences of mothers in our community. While we strive to provide helpful insights, this content is for informational purposes only and should not be considered medical advice. Always consult with your pediatrician, healthcare provider, or other qualified medical professional for any questions regarding your child's health or development.
Last reviewed: June 17, 2026
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