While it’s true that most women’s breast sizes change over the course of pregnancy and while breastfeeding, most maternity bras take this into account in their designs. By using stretchy fabric intended to accommodate growing bustlines and including extender hook enclosures to increase band length, one bra can be adjusted to fit a vast range of sizes. It’s also never a bad idea to get fitted by a professional, even more than once, during pregnancy and into motherhood.