Quick answer: pregnancy changes how you sleep faster than any other stage of life. Most sleepers move to their side by mid-pregnancy, and the mattress that worked before often stops working the moment your hips and shoulder start doing extra overnight work.
From mid-pregnancy most sleepers follow the general side-sleeping guidance midwives and doctors give, and side sleeping is exactly the position memory foam is built for: the shoulder and hip sink into a contouring layer while a high-density core underneath keeps the spine level rather than hammocked.
What matters in a pregnancy mattress:
- Side-sleeping pressure relief at the hips and shoulder.
- A supportive core with a published density figure.
- Temperature control, since most people run warmer at night during pregnancy.
- A real trial that covers changing months, not a ten-minute showroom visit.
See the Full Pregnancy Mattress Guide →
Trimester by trimester
First trimester is when many people first notice an old mattress's pressure points. Second trimester is where side-sleeping cushioning starts earning its keep every night. Third trimester puts the support core to its heaviest work, and a supportive edge helps with getting in and out of bed. The same pressure-relief and motion-isolation qualities carry straight into the broken-sleep months after the baby arrives.
Frequently asked questions
What is the best mattress for pregnancy?
A contouring, supportive mattress that makes side sleeping comfortable, since that is the position most pregnant sleepers settle into for months. The Mr Mattress Revive Memory Foam cushions the hips and shoulder while a published 50 kg/m3 core keeps the spine supported.
Does mattress firmness matter more as pregnancy progresses?
Yes. As weight shifts forward, a too-soft mattress lets the hips sink and twist. A medium contouring feel over a firm core is the practical middle ground, and a real trial period matters because your body changes month to month.
Can a mattress help a partner sleep too?
Foam absorbs movement instead of bouncing it across the bed, so position changes and night-time trips disturb a partner less than on an old spring bed.
Regional guides: Gauteng · Cape Town · KZN · Mpumalanga
Every Mr Mattress is built with SABS-approved foam, comes with a 365-night home trial, and ships with free delivery nationwide (a small fee applies only in extreme rural areas).
Reviewed by Andries Taljaard, Founder of Mr Mattress.