If you're normally small-chested, pregnancy offers the best chance you'll ever have to forego the padded bras and flaunt cleavage, so take advantage of this fortuitous occasion and wear scoop-neck T-shirts or sweaters.
If you enjoyed wearing skinny jeans before you were an expecting mama, don't be afraid to don tight-fitting pants now just because you're pregnant. Many maternity lines are now making stretchy, super-comfy (and chic!) skinny jeans and leather leggings that will fit and flaunt your new curves.
Reaching for bigger clothes to hide your size sounds like a good idea, but it only contributes to a bulky look. Instead, slim down your silhouette and emphasize the features that aren't expanding with snug-sleeved tops, skinnier pants, and button-down shirts or blazers (from your prepregnancy wardrobe) left unbuttoned. Try knits that stretch to fit your form -- they're sexy and feminine. If all else fails, break out a crisp men's dress shirt and pair it with leggings or jeans and a fitted T-shirt or tank underneath. This look is the perfect mix of sexy, modern, and classic style.
Don't limit yourself to black and neutral tones -- color is an essential part of the modern maternity closet. You'll feel happier when you're wearing clothes that aren't drab. But, if you're really a color-phobe (or if you're feeling budget-conscious), just throw a bright sweater around your shoulders to complement an all-black outfit.
Perk up a staid wardrobe with just a few decorative elements, such as ruffled trims or embroidered or beaded accents. Just be sure to stick with things that you'll be able to wear more than once without feeling too conspicuous.
One of the easiest ways to add dimension and flare to an otherwise simple ensemble is to put on your favorite accessories and jewelry. Try long, dangling earrings and lariat necklaces to de-emphasize fullness in your face. Wear a patterned scarf in your hair, put a jeweled cuff on your wrist, or carry a chic handbag. Better yet, if you're not going to be on your feet all day, throw on some fun open-toe sandals or sling-backs. Sexy shoes can instantly perk up practically any outfit.