Hi, Dr. Oz here, with a smart health tip for you. This one is for pregnant moms. A new study shows that being overweight before or during pregnancy boosts your child's risk for health problems well into adulthood. Seventy percent of overweight women gain too much weight during pregnancy. That puts excess fat on a newborn, which turns into a higher risk of obesity, type 2 diabetes, and heart problems as a young adult.If you're overweight and thinking about having a baby, one of the best things you can do for your child is to lose some weight before you get pregnant.Here are some ways to melt some of that belly fat:Watch your portions. Use an 8-inch salad plate for your meals. Fill half with veggies, a quarter with whole grains, and a quarter with lean protein.And spice up your food with chiles. They help boost your metabolism.Sip green tea. It's loaded with EGCG, a polyphenol that zaps fat.Get more exercise. Take a morning and afternoon walk.Keep up these habits for a healthy baby who will grow into a healthy adult.For more ways to keep your family well, watch all our smart tips right here.