Safe Sleep Positions During Pregnancy
Sleep gets harder as pregnancy progresses, and many people worry about which positions are safe. Here's a trimester-by-trimester guide, with the usual caveat to follow your own provider's advice.
First Trimester
Early on, before your bump grows, you can generally sleep in whatever position is comfortable — back, side, or front. This is a good time to start getting used to side-sleeping, since it will become the recommended position later.
Second and Third Trimesters
As your uterus grows, sleeping on your side — often the left side — is generally recommended. Side-sleeping improves blood flow to the placenta and keeps the weight of the uterus off the large vein (the inferior vena cava) that returns blood to your heart.
If you wake up on your back, don't panic — simply reposition to your side. A pregnancy pillow or a pillow between the knees and behind the back can make side-sleeping much more comfortable.
Positions to Limit Later On
- Flat on your back for long periods in the third trimester can compress major blood vessels and cause dizziness — propping up with pillows or turning to the side helps.
- Stomach sleeping becomes physically impractical as the bump grows.
Better Sleep Tips
Beyond position, a consistent bedtime, limiting fluids right before bed, and a cool, dark room all help. Frequent night waking is normal in pregnancy; naps can help you catch up.
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Pregnancy Week Calculator →Frequently Asked Questions
Do I have to sleep on my left side?
The left side is often recommended for blood flow, but either side is considered fine. The key is side-sleeping rather than flat on your back in later pregnancy.
What if I wake up on my back?
Don't worry — just roll back onto your side. Brief periods on your back are not something to panic about; simply reposition.
Are pregnancy pillows worth it?
Many people find them very helpful for supporting the bump, back, and knees, making side-sleeping more comfortable.