Choosing a maternity sweater for layering and comfort
Knit stretches, so many sweaters work over a bump without a maternity pattern — but the maternity versions differ in where that stretch goes. A maternity-cut sweater keeps the front hem long enough to stay down over the bump, while an ordinary sweater in a bigger size tends to sit shorter at the front and wider at the shoulders.
The style decides how you layer. Open-front cardigans go over a fitted top and never need to fit the bump at all, which is why they usually keep working after birth. Pullovers and turtlenecks sit closer, so front length and body width matter more. Knit sweatshirts and hoodies sit between the two: soft, warm and forgiving, but bulkier under a coat.
Yarn is worth comparing directly. Wool and wool blends insulate and hold shape; cotton and cotton blends are easier to wash and cooler; cashmere and fine merino are lighter but need gentler care. Because sweaters are often worn for months and kept afterwards, fabric composition and care instructions in each brand's store are as useful a comparison as price.