Written and maintained by CASRAI Editorial Board
Published · Last updated
This page describes products and general use; it is not medical advice.
On this page
A pregnancy support belt (also sold as a maternity belt or belly band) is a wearable abdominal and back support. In the United States the FDA lists it as “Orthosis, Truncal, Pregnancy” (product code QSB), a Class I device regulated under 21 CFR 890.3490. A systematic review published in 2009 found insufficient scientific evidence that such belts reduce pregnancy-related low back pain.
Who uses it: pregnant people who are considering a support garment, and the clinic staff, students and buyers who need to understand how the product class is defined and regulated.
What a pregnancy support belt is
FDA’s product classification database defines product code QSB as a device that provides abdominal and back support during pregnancy. The device name is “Orthosis, Truncal, Pregnancy”. “Belly band” and “maternity belt” are everyday names for the same product class; the FDA record does not distinguish between them. The 2009 review below describes maternity support belts as one of four main types of maternity support garments, a category that is widely commercially available.
How it is classified and regulated
21 CFR 890.3490 defines a truncal orthosis as a device intended for medical purposes to support or to immobilize fractures, strains, or sprains of the neck or trunk of the body. The regulation lists abdominal, cervical, cervical-thoracic, lumbar, lumbo-sacral, rib fracture, sacroiliac and thoracic orthoses and clavicle splints as examples. Truncal orthoses are Class I (general controls) and exempt from 510(k) premarket notification, subject to the limitations in 21 CFR 890.9. They are also exempt from the quality management system requirements of part 820 except the records and complaint-file requirements (820.35).
Reading this plainly: Class I status means the device sits in the lowest FDA risk category and is subject to general controls. It is a statement about regulatory category, not a finding that the product relieves any condition.
Types and related FDA device categories
Pregnancy belts sit in a family of body-worn supports. These FDA classifications are the closest neighbours; all are Class I.
| FDA device name | Product code | Regulation | What the FDA record says |
|---|---|---|---|
| Orthosis, Truncal, Pregnancy | QSB | 21 CFR 890.3490 | Provides abdominal and back support during pregnancy |
| Orthosis, Lumbo-Sacral | IPY | 21 CFR 890.3490 | Lumbo-sacral orthosis, listed among the truncal orthosis examples in the regulation |
| Band or Belt, Pelvic Support | ISR | 21 CFR 890.3025 | Pelvic support band and belt, classed as a prosthetic and orthotic accessory |
For the wider family of back supports see back brace types, sacroiliac belts and lumbar supports.
What the evidence says
Ho SSM, Yu WWM, Lao TT, Chow DHK, Chung JWY and Li Y reviewed the literature on maternity support belts (J Clin Nurs 2009;18(11):1523-1532), searching MEDLINE, CINAHL, the Cochrane Library and patent databases. They reported limited evidence in support of commercial maternity products for preventing or treating low back pain, other than evidence from manufacturers, although a potential stabilisation effect was demonstrated in some studies. Their conclusion: “There is insufficient scientific evidence to conclude that wearing maternity support belts reduces pregnancy-related low back pain and/or pelvic girdle pain.”
The review was published in 2009.
Safe use and handling basics
The same review lists adverse effects reported in the literature: increased pain, fetal heart rate changes, skin irritation and discomfort. This page gives general product information only, with no individual advice and no wearing schedule.
Common mistakes
- Treating “FDA Class I” or “510(k) exempt” as evidence of effectiveness. It describes the regulatory category (see above).
- Treating manufacturer benefit claims as independent evidence. The 2009 review noted that support for commercial products came mainly from manufacturers.
Frequently asked questions
Is a belly band for pregnancy the same as a pregnancy support belt?
In everyday use the names overlap. The FDA record describes one product class, QSB, that provides abdominal and back support during pregnancy, and does not separate “belly band” from “belt”.
Is a pregnancy support belt a medical device?
In the United States, yes: the FDA lists it as a Class I truncal orthosis under 21 CFR 890.3490, exempt from 510(k) premarket notification (checked 2026-10-30).
Does a pregnancy support belt relieve back pain?
A 2009 systematic review found insufficient scientific evidence to conclude that it does, while noting a potential stabilisation effect in some studies.
Sources
- FDA Product Classification, product code QSB, “Orthosis, Truncal, Pregnancy” (checked 2026-10-30): FDA product classification QSB. Product codes IPY and ISR checked via the openFDA device classification API, 2026-10-30.
- 21 CFR 890.3490, Truncal orthosis (checked 2026-10-30): eCFR 890.3490.
- Ho SSM et al. Effectiveness of maternity support belts in reducing low back pain during pregnancy: a review. J Clin Nurs 2009;18(11):1523-1532, PMID 19490291, checked 2026-10-30: PubMed abstract.
