Side sleeping during pregnancy is not just comfortable — from the second trimester onward, healthcare professionals actively recommend it. Sleeping on the left side improves blood flow to the placenta, reduces pressure on the liver, and helps kidney function. However, the physical changes of pregnancy (growing bump, shifting centre of gravity, pelvic joint loosening) create unique pillow requirements that standard side-sleeper advice does not fully address.
Changing Pillow Needs Through Pregnancy
First Trimester
During the first trimester, pillow needs remain similar to pre-pregnancy requirements. Standard side-sleeper principles apply: firm, high-loft pillow for proper neck alignment (12 to 16 cm compressed depending on shoulder width). Nausea and breast tenderness may affect sleeping position preferences, but physical body changes are minimal at this stage. A standard quality memory foam or latex pillow provides appropriate support.
Second Trimester
As the bump grows, sleeping on the back becomes uncomfortable and potentially harmful (the weight of the uterus can compress the inferior vena cava, reducing blood return to the heart). Side sleeping becomes the primary position, and supporting the bump becomes a new requirement. A pillow placed under the bump prevents it from pulling the body forward and rotating the spine. A pillow between the knees maintains hip alignment as the pelvis begins to loosen under relaxin hormone influence.
Third Trimester
The third trimester introduces maximum pillow demand. The larger bump requires more substantial support. Pelvic girdle pain (PGP) makes hip alignment critical — even small pelvic rotations during sleep cause significant discomfort. Heartburn and breathlessness may require slight upper body elevation. A wedge pillow under the upper body provides the slight incline that helps with reflux without the full elevation of stacking multiple pillows.
EPABO Contour Memory Foam Pillow
Pregnancy Pillow Types
Full-Length Body Pillows
Full-length body pillows (150 to 180 cm) run the entire length of the body, providing head, bump, and knee support in a single continuous pillow. Hugging the pillow supports the bump and top arm simultaneously while the lower portion fits between the knees for hip alignment. Full-length body pillows are the most versatile single-pillow solution for pregnant side sleepers.
C-Shaped Body Pillows
C-shaped pillows curve around the body, supporting the head at the top and the knees at the bottom with the curve supporting either the bump (front) or the back (behind). The continuous shape prevents the pillow from shifting during the night. C-shaped pillows work well for pregnant women who tend to stay on one side throughout the night.
U-Shaped Body Pillows
U-shaped pillows surround the body on both sides, providing support regardless of which side you face. For pregnant women who switch between left and right sides (recommended to prevent pressure buildup on one hip), the U-shape means not having to rearrange the pillow with each turn. The trade-off is that U-shaped pillows are large and take up significant bed space — something to consider if sharing with a partner.
Wedge Pillows
Wedge pillows are compact, triangular pillows that provide targeted support for specific areas. A small wedge under the bump supports its weight without a full body pillow. A wedge behind the back prevents rolling onto the back during sleep. A larger wedge under the upper body helps with third-trimester heartburn. Wedge pillows can be used alongside a standard head pillow and knee pillow for a modular support system.
Head Pillow Considerations During Pregnancy
Your head pillow needs may change during pregnancy because relaxin hormone loosens the cervical joints, making the neck more vulnerable to misalignment during sleep. A firmer, more supportive head pillow provides stability that loosened joints need. Contoured cervical pillows with built-in neck rolls provide passive support that reduces the demand on softened ligaments.
If congestion becomes an issue (pregnancy rhinitis affects 20 to 30% of pregnant women), slight head elevation helps drainage. A pillow 2 to 3 cm higher than pre-pregnancy levels, or a thin wedge under the head pillow, provides the slight incline that helps breathing without significantly affecting neck alignment.
Pillow Materials for Pregnancy
Pregnancy increases body temperature slightly, which combined with the insulating effect of a large body pillow can create overheating issues. Cooling pillows or naturally breathable fills (latex, buckwheat) help manage the additional warmth. Our hot sleeper guide covers temperature management strategies that complement pregnancy pillow setups.
Avoid strong-smelling pillow materials (new memory foam off-gassing can be particularly unpleasant during pregnancy when smell sensitivity increases). Air any new foam pillow for 48 to 72 hours in a well-ventilated room before use. Natural and organic pillow options appeal to pregnant women who want to minimise chemical exposure during pregnancy.
Coop Home Goods Original Adjustable Pillow
After the Baby Arrives
Pregnancy pillows remain useful postpartum. Nursing pillows provide specialised breastfeeding support, but a C-shaped or U-shaped body pillow can serve double duty as a nursing support. The body pillow also continues supporting side sleeping during postpartum recovery, which is particularly important after caesarean section when certain positions cause incision discomfort.
Our pillow care guide covers maintaining body pillows through the increased use they receive during pregnancy. A waterproof protector is especially valuable during this period when hormonal sweating and potential leaking make pillow hygiene more demanding.
| Pillow | Best For | ||
|---|---|---|---|
|
EPABO Contour Memory Foam Pillow | Best for neck pain | View |
|
Coop Home Goods Original Adjustable Pillow | Best value adjustable | View |
Left-side sleeping with the right pillow can reduce reflux symptoms. Check our guide to the best pillows for acid reflux for elevated options.
Teresa created SaunaReviewer.com after discovering how transformative sauna therapy was in her own life. Today, she helps thousands of readers find reliable, honest information about saunas, accessories, and at-home wellness. Her mission is to make choosing the right sauna easier, clearer, and stress-free.
