Pregnancy Swim Suits: Buying for an Antenatal Class

Buy a pregnancy swim suit built for swimming, not for photographs. That means a one-piece or a high-waisted tankini in chlorine-resistant fabric, with real bust support, wide straps that do not dig, and a body that stretches over the bump rather than gripping it. Buy your pre-pregnancy size in a maternity cut rather than sizing up in a standard suit — sizing up gives you a wider suit, not a longer one, and it will roll off your shoulders. And buy it once you are actually showing, not at eight weeks.

We do not sell swimwear. We teach pregnant swimmers, and the complaints are always the same three: the straps cut into the shoulders, the suit rides up over the bump on every push-off, and the chlorine ate it in six weeks. All three are solved at the point of purchase.

What Swimming Asks of a Suit

A suit worn beside a pool needs to look good and stay on. A suit worn in a class needs to survive a wall push-off, a backstroke arm, forty minutes of chlorine, and a body that will change shape again next month.

The difference shows in three places.

Fabric. Polyester and PBT hold up in chlorinated water for a year or more. The nylon-elastane blends used in most fashion swimwear go baggy and then translucent within a season.

Straps. Wide, adjustable, ideally crossed or racer-backed. A growing bust plus a thin strap equals shoulder pain within weeks.

Torso length. Maternity cuts add length as well as width. That is what stops the suit crawling upwards.

Styles Compared

Buying Across Three Trimesters

1. First trimester. Your usual suit will very likely still fit. Bust changes arrive before bump changes, so if anything is uncomfortable it will be the chest. Wait before you spend.
2. Second trimester. This is when to buy properly. Maternity cut, pre-pregnancy size, a stretch panel rather than a fixed pouch. Try it on and reach both arms overhead — if the suit pulls down at the shoulders, it is too short in the body.
3. Third trimester. The second-trimester suit should still work if the panel was generous. Many swimmers add a second, roomier one. Prioritise getting in and out easily over anything else.

A practical note nobody mentions: you will need the toilet, often, and a one-piece is a nuisance. Tankinis exist for this reason.

Common Mistakes

• Sizing up in a normal swimsuit. Wider, not longer. It will roll off your shoulders.
• Buying fashion swimwear for a class. Chlorine destroys it and it offers no bust support.
• Thin spaghetti straps. Six weeks of a heavier bust and they will hurt.
• Buying too early. Your shape at fourteen weeks is not your shape at thirty.
• Ignoring the overhead test. Reach overhead in the changing room. Always.
• Skipping the rinse. Rinse in fresh water and dry flat in the shade. Never wring it out.
• Wearing a maternity support band under the suit. It bunches, holds water and drags.

Safety in the Water While Pregnant

Swimming is widely regarded as one of the more comfortable ways to stay active during pregnancy, because the water carries your weight. That said, this is a swimming school writing, not a doctor. Talk to your midwife or obstetrician before starting or continuing any exercise, and follow their advice over anything here.

A few things we insist on with pregnant swimmers:

• The pool deck is slippery and your balance has changed. Walk. Use the steps and handrail rather than climbing out on your arms.
• No diving, no jumping in. Enter feet first, always.
• Never hold your breath or do underwater lengths. Breath-holding can cause shallow-water blackout — a silent, warningless loss of consciousness that has drowned strong swimmers — and there is no reason to attempt it.
• Avoid overheating. Hot outdoor pools in the Singapore afternoon, hot tubs and saunas are best avoided. Cool water, cooler hours.
• Drink. You dehydrate in the water without noticing.
• Stop for pain, dizziness, contractions, bleeding or fluid loss and contact your doctor. Do not finish the class.
• Breaststroke can aggravate pelvic girdle pain. If your hips or pubic bone hurt, switch to freestyle or backstroke and speak to a physiotherapist. Do not push through it.

Getting Back in the Pool

If you have not swum since school, pregnancy is a reasonable time to start — the water is kind and the effort is self-limiting. It is also a good time to have somebody watching your stroke, because a poor breaststroke will find your hips.

Adults who want quiet, unhurried water time usually get on best with private swimming lessons, though group swimming classes and antenatal aqua sessions suit swimmers who like company — see choosing an antenatal aqua class. Those with access to a home pool can practise between sessions; see swimming safely while pregnant in a condominium pool. To find a quieter pool, use swimming near me.

Public pool timings and off-peak hours are listed by ActiveSG.

Frequently Asked Questions

When should I buy a pregnancy swim suit?

Usually in the second trimester, once your shape has settled enough to fit properly.

Do I need a maternity-specific suit?

If you only wade and sunbathe, no. If you swim lengths or attend a class, yes — the extra torso length is what stops the suit riding up.

What fabric lasts in a chlorinated pool?

Polyester or PBT blends. Nylon-elastane fashion swimwear degrades quickly and loses shape.

Can I wear a bikini while pregnant?

Of course. It is simply not practical for swimming lengths, because there is no support and it will not stay put off a wall.

Is it safe to swim in the third trimester?

Many women swim comfortably until close to their due date, but this is a question for your doctor or midwife. Stop if anything hurts.

How do I stop my suit going baggy?

Rinse in cold fresh water after every swim, dry it flat out of direct sun, never wring it, and rotate two suits if you swim often.