Best Maternity Bras

The short answer

Why maternity bras are harder than they should be

Three things change, and not together.

Your rib cage expands. This is the one people do not expect. The lower ribs flare outward to make room, so band size increases — often by one or two sizes — before the cups change much. A bra that fits the cups and is tight across the back is the usual first symptom.

Your breasts grow, early and then again later. Often noticeably in the first trimester, then more gradually, then again sharply around the birth when milk comes in.

They get tender. Breast tenderness is listed among the common early symptoms of pregnancy, and it arrives before any size change does. In the first trimester, softness matters more than support.

So the practical approach is to buy for the stage you are in rather than trying to find one bra for all of it.

What to buy, and when

The 36-week point is the useful one: buy nursing bras then rather than at 20 weeks (when the band will be wrong) or after the birth (when you are judging fit while engorged). See when to buy nursing bras.

Wires: the honest position

There is no rule against underwires in pregnancy, and plenty of people wear them throughout. The practical case for wireless is that your shape is changing continuously, and a wire that fitted last month can end up sitting on breast tissue rather than in the root of the breast.

That is a fit problem rather than a wire problem, but because fit is a moving target in pregnancy, wireless is the lower-effort default. If you have a well-fitting underwired bra that is comfortable, there is no reason to abandon it.

Sizing: measure the band

If you take one thing from this page: measure your band, under the bust, snug but not tight. That is the number that changes first and the one letter sizing handles worst.

Above roughly a D cup, buy band-and-cup sizing rather than S/M/L. Letter-sized bras grade band and cup together in a fixed ratio, so at the edges you get a bra that is simultaneously too big and too small — which is a pattern-grading limitation rather than anything you are measuring wrong. We go through this in nursing bras for large breasts.

Do you need a maternity bra at all?

Honestly, not necessarily. What you need is a bra that fits the body you have now, and a soft wireless bra in the right size does that whether or not it is sold as maternity.

What maternity and nursing bras add is stretch built for a changing shape, and clip or wrap access for feeding. The second is the real reason to buy maternity rather than ordinary: a clip-down bra bought at 36 weeks saves you buying again in week two postpartum.

One case where maternity-specific genuinely matters: sports bras. ACOG and the NHS both encourage staying active in pregnancy, and a properly supportive bra makes more difference to whether exercise is comfortable than almost anything else. See maternity activewear.

How we picked

Six axes: support, tolerance of size change, genuine size range, fabric and breathability, comfort lying down, and whether it converts to nursing. Tolerance of size change is weighted heavily because it is what decides whether a bra bought in month four is still worn in month eight.

We read the current listings and the reported fit experience; we have not worn these. The method is on how we pick.

One thing to mention to your provider

Breast changes in pregnancy are normal and expected. A new lump, a persistently tender or red patch, skin dimpling or puckering, or discharge that is bloody are not things to attribute to pregnancy and wait out — mention them to your midwife, OB or GP. Pregnancy does not make those less worth checking.