Good sleep gets harder exactly when you need it most — and the way you lie down makes a real difference. The short answer: sleep on your side, support yourself with pillows, and don't panic when you wake up in another position.
Why the side is best
Side sleeping — many doctors suggest favouring the left side, though either side is fine — keeps things flowing the way they should as the bump grows:
- Keeps blood circulation smooth for you and the baby
- Supports better oxygen supply
- Reduces strain on your back and organs
- Can ease swelling in the legs and feet
Lying flat on the back in later pregnancy lets the weight of the uterus press on the major blood vessel returning blood to your heart, which is why back sleeping starts to feel dizzy or breathless for many women — the body usually protests before any harm is done.
Making it comfortable
The side position works far better with support:
- A pillow between the knees aligns the hips and eases back strain
- A small pillow or wedge under the tummy takes the weight off
- A cushion behind the back stops you rolling and adds stability
A full-length pregnancy pillow does all three jobs at once, but three ordinary pillows work just as well.
If you wake up on your back
It happens to everyone, and it isn't an emergency — your body typically shifts on its own or wakes you when a position stops working. Just roll back to your side and carry on sleeping. The goal is starting on your side, not policing yourself all night.
Frequently asked
Is the left side really better than the right?
The left side is often suggested because it optimizes blood flow past the liver, but the honest answer is: either side is good. Comfort and actually sleeping matter more than the specific side.
From which month should I stop sleeping on my back?
Roughly from the second half of pregnancy (around 20 weeks), start favouring your side as the default — earlier than that, position matters little.
Can I sleep on my stomach in early pregnancy?
In the first trimester, yes, if it's comfortable — the uterus is still protected within the pelvis. It naturally becomes impossible later.