Nursing and maternity bras: when to get fitted
When to switch to maternity bras, when to buy nursing bras, and why fit matters more than usual while you are feeding.
Your bra size changes more during pregnancy and early feeding than at almost any other time in your life. This is one stretch where being refitted a few times genuinely pays off, both for comfort and for avoiding a couple of real problems.
Early pregnancy: soft and wire-free
Growth often begins in the first trimester. When your usual bra starts to feel tight, switch to a soft, wire-free maternity bra. Going wire-free early lets you grow without a rigid wire pressing where it should not.
Through the middle: expect to change size
The second trimester is usually when size changes most, and your ribcage widens as well, so the band grows too. Getting re-measured every six weeks or so keeps you in something that actually fits. Many women go up several cup sizes across pregnancy and feeding combined.
Around 36 to 38 weeks: the nursing-bra fitting
This is the key window. By around 36 weeks most of the structural growth has happened, so a nursing bra bought now will be close to what you need once your milk comes in, though expect a little more cup room in the early days after birth. Buy a couple to start rather than a full drawer, since you may shift again.
Why fit matters more than usual
A band that is too tight, or an underwire pressing on the breast, can contribute to blocked ducts and, if it carries on, to mastitis. During early feeding your breast volume changes between feeds, so wire-free is the safe default. Softer flexible-wire styles are usually fine once your supply has settled. Look for drop-down cups you can undo with one hand, which you will appreciate at three in the morning. When you are ready, you can find boutiques that fit for nursing and maternity, or search near you.