Mattress for Pregnancy - Sleep Positions and Buyer’s Guide – Sonno
TODAY'S DAILY DEAL - EXTRA 25% OFF - ENDS IN:
0d 0h 0m 0s Applied At Checkout
Sonno Logo
Free
Swatches
0 My Basket
  • Beds
    • Divan Beds
    • Upholstered Beds
  • Storage Beds
    • Ottoman Divan Beds
    • Upholstered Ottoman Bed
  • Kids
    • Kids Divan Beds
    • Kids Ottoman Divan Beds
    • Kids Upholstered Beds
    • Kids Upholstered Ottoman Beds
  • Headboards
  • Mattresses
    • Orthopaedic Mattress
    • Pocket Sprung Mattress
    • Memory Foam Mattress
    • Pillowtop Mattress
    • All Mattresses
  • Furniture
    • Storage Boxes
    • Bedside Tables
    • Chest of Drawers
  • 60 Night Risk-Free Trial

    60 Night Risk-Free Trial

  • Fast Free delivery

    Fast Free delivery

  • Handmade In UK

    Handmade In UK

  • Pay Monthly

    Pay Monthly

Sonno Logo
  • Home
  • Beds
    • Divan Beds
    • Upholstered Beds
  • Storage Beds
    • Ottoman Divan Beds
    • Upholstered Ottoman Bed
  • Kids
    • Kids Divan Beds
    • Kids Ottoman Divan Beds
    • Kids Upholstered Beds
    • Kids Upholstered Ottoman Beds
  • Headboards
  • Mattresses
    • Orthopaedic Mattress
    • Pocket Sprung Mattress
    • Memory Foam Mattress
    • Pillowtop Mattress
    • All Mattresses
  • Furniture
    • Storage Boxes
    • Bedside Tables
    • Chest of Drawers
  • Free Swatches

  • Contact us
  • Delivery Information
  • Customer Service
  • 01924 926117
Mattress Guide

Best Mattress For Pregnancy: The Ultimate Guide

7 min read
November 27, 2025
By Sonno Beds
Best Mattress For Pregnancy: The Ultimate Guide

Summary: 

Pregnancy alters all things, including the way you sleep and the frequency of wakefulness. What was previously considered a fine mattress may suddenly become too firm, too soft, too hot or even unsupportive. We discuss in this elaborate guide the precise characteristics of a good mattress during pregnancy, including its firmness, pressure relief, cooling, support and safe materials. You will find out how pregnancy impacts your body when you are asleep, what to consider in various trimesters, the pros and cons of the various types of mattresses, and how to pick one depending on your weight, position of sleep position, and your budget.


Pregnancy can be treated like a riddle where you are always trying to figure out how to sleep. You might feel well in the start, but the following week, your hips are sore, your back is sore, you are overheated, and it doesn’t appear that anything is good. It is not in your head alone, but your body undergoes significant changes, and it has a direct impact on the way you sleep and how the mattress feels.

Your centre of gravity will change as your bump expands, your hormones cause the joints and ligaments to loosen and the weight is spread across your mattress in a different way. That which used to feel supportive might now lead to pressure on your hips, shoulders and lower back. To add to that, most expectant women have issues of overheating, heartburn, and insomnia.

A proper mattress cannot solve all the pregnancy symptoms, but it can make a tremendous difference. A mattress for pregnancy will keep your:

  • Spine in line
  • Fill in sensitive points
  • Promote better blood flow
  • Help your body sleep
  • Supports pregnancy-safe sleep positions

We will provide a detailed explanation on:

  • What to buy?
  • What features are most important?
  • How do the needs change depending on the trimester?
  • How to find the best mattress options?

This is your full guide to better sleep as a pregnant woman.

How Pregnancy Changes Your Sleep & Mattress Needs?

Here are common pregnancy sleep challenges:

  • Backache - because of the gain of weight, change of posture, and lax ligaments.
  • Pain in the hips and pelvis - additional pressure during side sleeping.
  • Overheating and night sweats - hormone changes increase the body temperature.
  • Often, tossing and turning - attempting to get comfortable.
  • Swelling legs and feet - difficulty in carrying blood or pressure on blood vessels.
  • Heartburn and reflux - particularly when lying on your back.

These problems should be alleviated by a good pregnancy mattress, rather than aggravated.

Key Mattress Features To Look For During Pregnancy

1. Firmness: Why Medium-Firm Wins Most Of The Time

Body Weight (Approx.)

Recommended Firmness

Notes

Under 60 kg

Medium / Medium-Soft

Extra cushioning for joints

60–90 kg

Medium to Medium-Firm

Good balance of support and comfort

Over 90 kg

Medium-Firm to Firm

Prevents sinking and keeps alignment

 

2. Pressure Relief

The bigger your bump is, the heavier your hips, shoulders and knees have to bear, particularly side sleeping. Look for:

  • Memory foam mattresses, latex and high-quality foam comfort layers.
  • Mattresses that identify themselves as pressure-relieving or contouring.
  • Zonal support or ergonomically supportive layers, which vary in their support of various parts.

3. Support & Spinal Alignment

Good support = your spine is kept in a natural, neutral position with lying on your side.

Signs of poor support:

  • You do wake up with back stiffness.
  • Your hips are sinking
  • Your belly pulls your spine downward

Mattresses that have foam layers of high quality that are either hybrids or pocket springs are usually good at supporting.

4. Cooling & Breathability

If you’re sleeping hot at night, consider:

  • Breathable covers
  • Open-cell foams
  • Gel-infused foams
  • Pocket springs 
  • Latex mattresses

5. Motion Isolation & Edge Support

Motion isolation - Minimum transfer of motion when your partner moves or rises. For this, foam and hybrids are excellent.

Edge support - Stiffer sides help to make getting out of bed and sitting on the bed easier (really useful midway through pregnancy!).

Comparing Mattress Types for Pregnancy

1. Memory Foam Mattresses

Best use: Pressure relief and side sleepers.

Pros:

  • Great for hips and shoulders
  • Excellent motion isolation
  • Reduces pressure points

2. Pocket-sprung mattresses

Pocket sprung mattresses are best for: Moderate feel, support + comfort, in all trimesters.

Pros:

  • Strong support from springs
  • Pressure relief foam mattresses
  • Better airflow than all-foam
  • Very stable, usually with good edge support

Cons:

  • Usually more expensive
  • Heavier to move

3. Latex Mattresses

Best for: Cooling, natural feel, durability.

Pros:

  • Naturally breathable and cool
  • Very durable and supportive
  • Slight bounce for easier movement

Cons:

  • More expensive
  • Less deep contouring than memory foam

Mattress Type Comparison For Pregnancy

Mattress Type

Support

Pressure Relief

Cooling

Motion Isolation

Best for

Memory Foam

Good

Excellent

Medium

Excellent

Side sleepers, joint pain

Hybrid

Excellent

Very Good

High

Good–Very Good

All trimesters, mixed sleepers

Latex

Very Good

Good

Very High

Good

Hot sleepers, eco-conscious

Pocket Spring

Very Good

Medium–Good

High

Medium

Back pain, classic feel

 

Mattress for Pregnancy Needs by Trimester

1. First Trimester

  • You might be comfortable 
  • Fatigue is high, but discomfort is low

Mattress priorities:

  • General comfort
  • Cooling

2. Second Trimester

  • The bump is increased.
  • It is often recommended that you spend a longer time not lying on your back.
  • You sleep on your side. 

Mattress priorities:

  • Hip and shoulder pressure relief.
  • Medium-firm to medium-strong support.
  • Pillow (between knees, under belly, behind back) space.

3. Third Trimester

  • The most challenging one is sleep.
  • This trimester includes swelling, back pains, pelvic pains and heartburn.

Mattress priorities:

  • Excellent pressure relief
  • Good edge support (in and out)
  • Cooling features
  • Good motion isolation

Trimester-by-Trimester Mattress Priorities

Trimester

Main Body Changes

Key Mattress Needs

1st

Fatigue

Mild changes

Overall comfort

Support

Cooling

2nd

Bump growth

Side sleeping

Medium-firm

Good pressure relief

Support

3rd

Heavier bump

Swelling

Discomfort

Strong support

Edge stability

Cooling

Motion isolation

 

Matching Mattress Features to Common Pregnancy Symptoms

Symptom / Problem

What Helps Most In A Mattress

Lower back pain

Medium-firm feel

Zoned support

Hybrid or latex

No sagging

Hip pain when side sleeping

Thick comfort layer

Memory foam or soft latex top

Good contouring

Overheating and night sweats

Breathable cover

Pocket springs

Latex or cooling foams

Swollen legs/feet

Slight elevation (use pillows)

Supportive but not too firm

Difficulty getting up

Strong edge support

Medium-firm feel

Partner disturbance

Good motion isolation 

General all-over discomfort

Pressure-relieving top layer

Pregnancy pillow + supportive mattress

 

Mattress For Pregnancy - Safe Sleep Positions

1. Left-side sleeping

  • Improve blood flow to the placenta
  • Reduce pressure on organs
  • Help with swelling

2. How A Mattress Supports Pregnancy Sleep Positions?

  • Side sleeping - requires hips and shoulders cushioning + good positioning.
  • Elevated upper body - assists with reflux, especially with the use of pillows or an adjustable frame.
  • No deep hammocking - Avoid a mattress on which your middle sinks.

Signs It’s Time to Replace Your Mattress During Pregnancy

You may need a new mattress if:

  • It’s older than 7–8 years
  • Dips or sagging are visible
  • You come driving down the middle of the night
  • You either wake up sore or stiff
  • You can sleep better in different beds

Pregnancy is likely to highlight any underlying concerns in your mattress; thus, what you used to overlook daily might be a problem for you nowadays.

Mattresses To Avoid During Pregnancy

1. Ultra-Soft Mattresses

  • Hips sink too deep
  • Spine curves too much
  • Increased back pain

2. Extra-Firm Mattresses

  • Pressure on the hips and shoulders
  • Numbness
  • Discomfort in arms and legs

3. Low-Quality, Cheap Foams

  • Quick sagging
  • Poor support
  • Potentially stronger off-gassing smells

Quick Checklist For A Pregnancy-Friendly Mattress

Feature

Ideal Choice During Pregnancy

Firmness

Medium to Medium-Firm

Mattress Type

Hybrid, memory foam, or latex

Pressure Relief

Yes – especially at hips and shoulders

Cooling

Good airflow, breathable cover, possibly cooling foam

Edge Support

Strong edges for easy entry/exit

Motion Isolation

Good, especially with a partner

Warranty & Trial

5–10+ year warranty, trial if possible

 

FAQs

What’s the best mattress for side sleeping during pregnancy?

  • Hybrid with foam top
  • Memory foam that hugs the body
  • Medium-firm feel
  • Strong pressure relief + alignment

How do I know a mattress is supportive enough?

  • Spine stays neutral when lying on your side
  • No sagging under the hips or belly
  • You wake up without stiffness
  • Pressure points feel reduced

  • Share on Facebook
  • Share on X

Newsletter

Sonno Footer Logo

Sonno Group Limited, Old Mills, Moortop, Drighlington, Bradford, BD11 1BY

01924 926117 support@sonno.co.uk

Mon - Fri 10 AM - 4 PM

Useful Links

  • Delivery Information
  • Warranty
  • Terms of Service
  • Refund & Returns
  • Privacy Policy
  • Klarna
  • Zopa
  • Contact us
  • Blog
  • Assembly Videos
  • Snap Finance

Newsletter

Copyright © 2026 All Rights Reserved

My Basket

Fast Free Delivery: Select date at checkout.
Total £0.00
View Basket Checkout