What Side Is Best to Sleep on When Pregnant

If you’re pregnant and keep wondering what side is best to sleep on when pregnant, you’re not alone. Most guidance recommends sleeping on your side, and the left side is often the preferred choice. Sleeping on the right side is usually considered safe, and the big “avoid this” position people repeat is sleeping on your back.

Think of it as a simple decision guide: choose the side that feels best, try to avoid back-sleeping, and keep adjusting as your pregnancy progresses—especially as you get closer to the late third trimester.

Left side vs right side: what most pregnancy sleep guidance recommends

Here’s the pattern you’ll see again and again in pregnancy sleep guidance:

• Side sleeping is the goal.
• The left side is often recommended as the better option.
• Both left and right side sleeping are generally safe during pregnancy.
• Sleeping on your back is not recommended, especially as time goes on.
• Side sleeping is often called out as especially important from around 28 weeks onward.

“Generally safe” vs “often recommended”

• Generally safe: left-side or right-side sleeping (most sources treat both as okay).
• Often recommended: left-side sleeping (commonly suggested, especially if you’re trying to be extra careful or you feel more comfortable that way).

Why left-side sleeping is often recommended (blood flow/placenta)

So why does the left side get all the hype?

Many physicians recommend sleeping on your left side because it’s described as supporting blood flow to the placenta. In plain terms: the goal is to make it easier for your body to do what it’s already working hard to do.

There’s also a comfort angle that comes up often. Some people find left-side sleeping helps with mild indigestion (that uncomfortable, refluxy feeling that can show up during pregnancy). If heartburn is part of your experience, that comfort benefit can matter as much as the “medical-sounding” reason.

Is sleeping on the right side while pregnant safe?

Yes—it’s usually safe to sleep on your right side while pregnant.

Even though left is often the preferred side, the key message from the guidance patterns is that right-side sleeping doesn’t automatically become “unsafe.” Most sources treat both sides as generally safe, with left being the common “better choice” when you can manage it.

If you’re worried about switching sides, keep this in mind: you don’t need to panic if you roll over. Just gently shift back toward whichever side feels best for you.

Can I sleep on the right side while pregnant?

Yes. Both sides are generally considered safe, and left is often recommended as the better option—not the only option.

When should you switch to side sleeping (e.g., from 28 weeks onward)?

You don’t have to wait until late pregnancy to start side sleeping. But the “around 28 weeks” callout is one you’ll see repeatedly in pregnancy sleep guidance.

A clear way to think about it:

• Any time during pregnancy: side sleeping is the go-to choice.
• From around 28 weeks onward: side sleeping is more strongly emphasized—especially avoiding sleep on your back.

If you’re already sleeping on your side now, that’s great. If not, it’s a good time to start making small changes—extra pillows, better positioning, and less time spent drifting into back-sleeping overnight.

Which sleeping position is not good during pregnancy? (back sleeping guidance)

This is the one most people get warned about:

• Sleeping on your back is not good during pregnancy.
• Guidance commonly says to sleep on your side, not on your back, and highlights side sleeping from about 28 weeks onward.

Back sleeping is often flagged because guidance trends focus on keeping side positioning. Even if you occasionally wake up on your back (it happens), the aim is to set yourself up so it’s easier to stay on your side.

Wrong sleeping positions during pregnancy

The big “no” that keeps coming up is:

• Back sleeping (especially later in pregnancy)

Pillow tips to help you stay on your side comfortably

If you’ve ever tried side sleeping and thought, “I can do it… until I can’t,” it usually isn’t about willpower. It’s about positioning.

Here are practical pillow ideas that match what pregnancy sleep guidance snippets often suggest—basically: use pillows to help you stay on your side and keep your body comfortable.

Simple setup that usually helps

• Body pillow: Hug one on your front so your torso stays turned to the side.
• Pillow between knees: This helps keep your hips from twisting and can reduce that pressure feeling on your lower back.
• Support behind you: If you tend to roll, place a pillow (or wedge) behind your back so you don’t flip onto your back.
• Adjust for comfort: Some nights you’ll want the pillow higher, other nights lower. It’s normal to tweak.

If you’re switching between left and right, use the same idea—just make sure your pillows support the side you’re aiming for.

Can I lay on my belly at 13 weeks pregnant?

The exact question—Can I lay on my belly at 13 weeks pregnant?—shows up in search questions, but the pregnancy sleep guidance snippets you provided mostly focus on side sleeping and avoiding back sleeping. Based only on what’s in those guidance patterns, the safest direction is to stick with side sleeping rather than belly sleeping.

If belly sleeping feels uncomfortable or creates pressure, switch positions. Comfort matters, and side sleeping is the commonly supported option.

Wrong sleeping positions during pregnancy: quick checklist

Here’s a fast “check yourself” list based on the patterns highlighted in the guidance:

Try to avoid:

• Sleeping on your back (the position most often flagged as not good during pregnancy)

Aim for:

• Sleeping on your side
• Left side is often recommended
• Right side is generally safe if that’s what you can comfortably manage

If you remember only one thing overnight, make it this: side sleeping beats back sleeping.

Trimester-by-trimester: what side to sleep on in the first, second, and third trimester

This is your decision guide by trimester—mirroring the questions people search for most, without adding extra medical claims.

First trimester (what side is best early?)

For early pregnancy, the guidance pattern is still the same: side sleeping is the preferred approach, and left is often recommended when you want to follow the most common advice.

If you’re early and you mostly sleep how you always do, try this:

• Start shifting to side sleeping when you can
• If you feel better on the left, make that your default
• If you’re more comfortable on the right, that’s still generally okay

Second trimester (what side is best mid pregnancy?)

By the second trimester, many people find side sleeping becomes easier to stick with. The same “left is often preferred” logic usually applies.

If you notice you wake up on your back, don’t stress about it—update your setup instead:

• pillows between knees
• a body pillow
• support behind you to reduce rolling

Third trimester (what side is best late in pregnancy?)

This is where the guidance gets more specific in search snippets:

• From around 28 weeks onward, side sleeping is strongly emphasized.
• Sleep on your side, not on your back.
• Left side is often the preferred option, but right side is generally safe.

If you’ve been sleeping on your back sometimes, try shifting to side sleeping before you hit that 28-week mark—or as soon as you can make it work comfortably.

Quick FAQ-style recap (the questions people ask most)

• What side is best to sleep on when pregnant first trimester? Side sleeping is recommended, and left is often the preferred option.
• What side is best to sleep on when pregnant third tri? Side sleeping is strongly emphasized (especially from around 28 weeks onward), and left is often preferred. Right is generally safe.
• Which sleeping position is not good during pregnancy? Sleeping on your back is the one most often flagged.
• Wrong sleeping positions during pregnancy: Back sleeping (most commonly called out).

If you’re shopping for comfort during pregnancy, check Baby Sock Shoe’s guides for supportive, flexible sock-shoe options for everyday movement.