I have a three weeks and one day to go until my due date, and I've officially outgrown my Bella Band, the nifty tube of black nylon and spandex that has kept my now unbuttonable Citizens of Humanity jeans securely at my hips even as my waistline expanded. Gravity is really working against me these days, which is why the invisible suspenders my stylist friend Natasha Federal produces and sells on her Web site, www.nivacollection.com, are a necessity now. I wear them over tank tops and under turtlenecks, but I can imagine skipping the turtleneck and tossing on a narrow blazer over a T-shirt and maternity jeans as the weather gets warmer. The suspenders, which key into spring's boy-for-girl trend, will pull the look together in more ways than one.