Nearly half of U.S. women gain too much weight while they're pregnant, and another 20 percent don't put on enough, federal health experts reported Thursday.
Fewer than a third of pregnant women put on the right amount of weight - something that's important for both mother and baby, the team at the Centers for Disease Control and Prevention found.
"It's not about eating twice as much. It's eating twice as healthy," she said.
How much moms should gain depends on their weight when they become pregnant.
U.S. & World
Experts say women of normal weight should add 25 to 35 pounds. Overweight women should gain 15 to 25, and obese women should only add 10 to 20. For unusually thin women, weight gain should be about 30 to 40 pounds.