Finding the best position for pregnancy sleep gets harder as your belly grows. By the third trimester, the positions that once felt fine can leave you achy, breathless, or wide awake at 3am. Here is what actually helps, and what to avoid.
Why Sleep Position Matters in Pregnancy
Your body is doing a lot. Blood flow, organ pressure, and comfort all shift as your baby grows. The position you sleep in affects all of these. Getting this right matters more from 28 weeks onwards, when your bump is large enough to put real pressure on key blood vessels.
According to Red Nose Australia, sleeping on your side from 28 weeks reduces the risk of stillbirth. This is one of the most important things you can do in late pregnancy.
Best Sleep Positions During Pregnancy
Left side sleeping
Left side sleeping is widely recommended. It takes pressure off your liver, which sits on the right side of your body. It also supports healthy blood flow to your kidneys and to your baby via the placenta. If you wake up on your back, simply roll back onto your left side and do not stress about it.
Right side sleeping
Right side sleeping is also safe, particularly in the first and second trimester. It is a good option if sleeping only on your left starts to cause hip or shoulder pain. Switching sides through the night is completely fine.
Using a pregnancy pillow
A good pregnancy pillow is practical, not a luxury. Placing a pillow between your knees reduces hip and lower back pressure. A full-length body pillow supports your belly and stops you rolling onto your back while you sleep. Browse our sleep essentials collection for pregnancy pillows and support products designed for comfort through every trimester.
Positions to Avoid and When
Sleeping on your back
From 28 weeks, sleeping flat on your back is not recommended. The weight of your uterus can compress the inferior vena cava, the large vein that returns blood to your heart. This can reduce blood flow to you and your baby. You may notice dizziness or shortness of breath as warning signs. Raising Children Network notes that back sleeping in late pregnancy can also affect your baby's heart rate.
Sleeping on your stomach
In early pregnancy, stomach sleeping is fine. Once your bump appears, usually around 16 to 20 weeks, it becomes uncomfortable naturally and most women stop without needing to think about it.
What to Do in the First and Second Trimester
Before 28 weeks, your position matters less from a safety standpoint. Sleep however feels comfortable. Many women find that starting a side-sleeping habit early makes the transition easier as the bump grows. If you are already a back sleeper, using a pillow wedge behind you can help you stay on your side without waking each time you shift.
Trouble sleeping does not end at birth. If you are already thinking ahead, our article on settling your newborn in those early weeks is worth reading before your due date.
Practical Tips for Better Sleep Right Through Pregnancy
- Use a firm mattress if possible. Soft mattresses increase lower back strain when side sleeping.
- Keep your room cool. Your body temperature rises during pregnancy and overheating disturbs sleep.
- Elevate your head slightly if heartburn or reflux is waking you. A wedge pillow works well for this.
- Avoid large meals within two hours of bedtime to reduce overnight discomfort.
- Reduce fluids in the hour before bed to limit overnight trips to the bathroom, though staying hydrated during the day remains important.
- A consistent wind-down routine helps signal to your body that sleep is coming, even when discomfort makes rest harder to find.
You can find supportive pillows and comfort products suited to pregnancy in our curated sleep range.
Once Baby Arrives
The sleep challenges do not disappear once your baby is born. A calm sleep environment makes a real difference in those early months. If your newborn is unsettled or difficult to put down, our guide on what to do when your baby will only sleep while being held offers practical steps that actually help.
