Best Sleep Positions During Pregnancy

Getting comfortable sleep during pregnancy can feel surprisingly difficult — especially as your belly grows. Certain positions can help improve blood flow, reduce back pain, and keep you and your baby safer. Here’s what to know and how to rest more comfortably.

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Why Sleep Positions Matter#

As pregnancy progresses, the uterus becomes heavier and can press on important blood vessels, nerves, and organs. The right sleep position helps ensure healthy circulation, easier breathing, and better overall comfort.

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Best Position: Sleeping on Your Left Side (SOS)#

Left-side sleeping is the most recommended position during pregnancy because:

• It improves blood flow to the placenta and baby
• It reduces pressure on the inferior vena cava
• It helps your kidneys work efficiently, reducing swelling
• It decreases strain on your lower back

How to Make Left-Side Sleeping More Comfortable#

• Place a pillow between your knees
• Add a small pillow under your belly for support
• Use a body pillow to keep your spine aligned
• Try a thin pillow behind your back to prevent rolling

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Right-Side Sleeping: Also Safe#

Right-side sleeping is acceptable and often comfortable.
There’s no evidence that it’s unsafe — it simply doesn’t offer quite the same circulation benefits as the left side.

If left-side sleeping feels restrictive, alternating sides is perfectly fine.

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Positions to Avoid#

❌ Back Sleeping (After ~20 Weeks)#

Sleeping flat on your back can:

• Compress major blood vessels
• Reduce blood flow
• Cause dizziness or shortness of breath
• Increase lower back pain

❌ Stomach Sleeping (Late Pregnancy)#

This becomes uncomfortable and impractical as your belly grows.

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Can I Use Pregnancy Pillows?#

Absolutely — pregnancy pillows can make side-sleeping far easier.

Types include:

• C-shaped pillows for full-body support
• U-shaped pillows to cradle both sides
• Wedge pillows for belly or back support

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Tips for Better Sleep Overall#

• Keep your room cool and dark
• Use a consistent bedtime routine
• Try stretching or prenatal yoga
• Avoid heavy meals close to bedtime
• Reduce late caffeine intake

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When To Talk to Your Provider#

Call your healthcare provider if you experience:

• Severe or persistent shortness of breath
• Frequent dizziness when lying down
• Pain that prevents you from sleeping

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Getting comfortable may take some trial and error — but finding the right sleep position can make a huge difference in how you feel throughout pregnancy.

Explore more pregnancy guidance with our Pregnancy Week-by-Week Guide or track healthy weight gain using the Pregnancy Weight Calculator.