Maternity belts and belly bands: which one, and how to wear it
A belly band holds your trousers up; a support belt lifts some of the bump's weight; a pelvic belt steadies the joints. Knowing which is which saves a wasted purchase.
Updated October 13, 2026 · sources checked October 13, 2026
In short
A maternity support belt sits under the bump and around the lower back to take some of the belly's weight off your back muscles; ACOG mentions such garments for back pain. A belly band is a stretchy tube mainly for clothes. A pelvic support belt, for pelvic girdle pain, should be chosen and fitted with a physiotherapist. Evidence is limited, so treat any belt as a comfort aid.
Four products sold under one name
Search for "maternity belt" and you will find four quite different things. Choosing well starts with naming them.
| Type | What it is | What it does | Typical use |
|---|---|---|---|
| Belly band (tube) | A wide seamless stretch tube | Holds open trousers in place, smooths the gap between top and waistband | Early pregnancy, in your usual clothes |
| Maternity support belt | A firm, wide panel under the bump that fastens at the back or sides | Carries part of the bump's weight off your lower back | Second and third trimester, standing or walking a lot |
| Pelvic support belt (SI belt) | A narrower, firm strap around the hips, below the bump | Steadies the pelvic joints | Pelvic girdle pain, ideally as advised by a physiotherapist |
| Full support garment or maternity girdle | Shorts or briefs with a built-in support panel | Lifts and holds the bump in one piece | Long days on your feet |
ACOG describes the support garment as looking like a girdle and helping take the weight of your belly off your back muscles. It also notes that some maternity trousers come with a wide elastic band under the curve of the belly that supports its weight, a simple first step before buying anything else.
Which one for which problem
- Your clothes no longer close: a belly band. It does not support your back.
- Your lower back aches by the evening: a maternity support belt or support garment, alongside the habits in our back pain guide.
- Pain at the front of the pelvis, in the groin or when parting your legs: this may be pelvic girdle pain (PGP). The NHS says a physiotherapist may recommend a pelvic support belt, or crutches, and that physiotherapy aims to improve joint stability. Ask your midwife for a referral before buying.
- After the birth: postpartum wraps are a different product, covered in our postpartum belly band guide.
What the evidence says
Studies on belts are few and small, so be wary of strong claims.
| Study | What was compared | Finding |
|---|---|---|
| Cochrane review, 2013 | Two types of pelvic support belt; a rigid belt added to exercise | Low-quality evidence from single trials: no difference between two belt types; adding a rigid belt to exercise improved average pelvic pain but not function |
| Heydari et al., 2022, 48 women | A belt with lumbar and pelvic support, a standard pelvic belt, no belt | Disability scores fell in both belt groups after three weeks; the difference between the two belts was not statistically significant |
In short: a belt can make you more comfortable, but it is one tool among several. Exercise, posture and physiotherapy have a broader evidence base.
How to fit a maternity support belt
- Measure around your hips and under the bump, standing, and compare with the size chart of the belt; between two sizes, the adjustable fastenings matter more than the label.
- Position the lower edge under your bump, resting on the pelvis, not across the middle or top of the bump.
- Fasten at the back first, then bring the side straps forward and close them under the bump.
- Check you can breathe deeply, sit down and bend comfortably; you should be able to slide a flat hand under the band.
- Readjust as your bump grows; most belts have several fastening positions for that reason.
What to look for in a support belt
| Feature | Look for | Why it matters |
|---|---|---|
| Lower edge | A wide, soft panel that sits under the bump, on the pelvis | Lifts rather than squeezes |
| Adjustability | Hook-and-loop or several fastening positions | Your bump keeps growing; one belt should follow you for weeks |
| Width at the back | Wide enough to cover the lower back | Spreads the hold instead of digging in one line |
| Fabric | Breathable, soft-edged, no seams against the skin | You may wear it for hours on your feet |
| Sizing | A chart based on hip or under-bump measurement, not dress size alone | Fit decides whether it helps or annoys |
| Care | Washable as the label says | Worn against the skin, it needs regular washing |
What you really need, and what is nice to have
| Really useful | Nice to have |
|---|---|
| Trousers or leggings with a supportive under-bump band | A separate belly band to keep wearing your own jeans early on |
| One adjustable support belt if your back aches by evening | A support garment for long days at work |
| A physio-chosen pelvic belt if you have pelvic girdle pain | A second belt to alternate while one is in the wash |
Printable checklist: before you buy a maternity belt
Wearing it day to day
- Wear it for the activities that make you ache: standing at work, walking, long errands. Take it off to rest and to sleep.
- Keep moving and keep exercising if your midwife or OB agrees; a belt does not replace the muscles that support your back.
- Choose breathable fabrics and wash the belt as the care label says.
- Any skin redness, tingling, numbness or a feeling of pressure means it is too tight: loosen it or take it off.
Is this normal? When to call
Back and pelvic aches are very common as the bump grows, and a belt can make the day more comfortable. Ask for help early rather than pushing through: your midwife, OB or GP can refer you to a physiotherapist. For urgent advice in the UK, NHS 111 or your maternity unit; in an emergency, 911 (US) or 999 (UK).
- Back or pelvic pain that is severe or lasts more than two weeks (ACOG).
- Back pain in the second or third trimester, or with fever, bleeding or pain when you pee (NHS: contact your midwife or GP urgently).
- Pelvic pain that makes walking, stairs or turning in bed hard: ask for a physiotherapy referral.
- Loss of feeling in your legs, bottom or genitals: call 999 in the UK or 911 in the US.
Questions parents ask
What is the difference between a belly band and a maternity belt?
A belly band is a soft stretch tube worn over unbuttoned trousers or to smooth a top; it gives little lift. A maternity support belt has a firmer panel under the bump and fastenings at the back or sides, designed to carry part of the bump's weight.
When can I start wearing a maternity belt?
Whenever your bump makes your back or pelvis ache, often from the second trimester. If you have pelvic girdle pain, ask your midwife for a physiotherapy referral so the belt is chosen and fitted for you.
Can a maternity belt harm my baby?
A correctly fitted belt sits under the bump and supports it rather than squeezing it. It should never feel tight across the top of your bump, restrict breathing or leave marks; if it does, loosen it or stop wearing it and ask your midwife.
Do maternity belts work?
Research is thin. A Cochrane review found only low-quality evidence from single trials on support belts, and a small 2022 trial found both belt designs it tested improved function. Many women find them comfortable, and ACOG lists support garments among the options for back pain.
Sources
- ACOG — Back Pain During Pregnancy (abdominal support garment, maternity girdle or brace) checked October 13, 2026
- NHS — Pelvic pain in pregnancy (pelvic support belts via physiotherapy) checked October 13, 2026
- NHS — Back pain in pregnancy checked October 13, 2026
- Pennick V, Liddle SD (2013), Cochrane — Interventions for preventing and treating pelvic and back pain in pregnancy (PMID 23904227) checked October 13, 2026
- Heydari Z et al. (2022), J Biomed Phys Eng — Modified lumbar pelvic belt vs current belt in pregnant women, RCT (PMID 35698541) checked October 13, 2026
Mamavela explains; it does not replace your midwife, doctor or pediatrician, who know your situation. If something worries you, call them. In an emergency, call 911 (US), 999 (UK) or 112.