That's a tall order, considering that about 55 percent of women of childbearing age are overweight and preconception care isn't that common.
Once a woman's pregnant, the guidelines issued Thursday aren't too different from what obstetricians already recommend - but they're not easy, considering about half of women fail to follow them today.
Among the advice: -A normal-weight woman, as measured by BMI or body mass index, should gain between 25 and 35 pounds during pregnancy. A normal BMI, a measure of weight for height, is between 18.5 and 24.9.
-An overweight woman - BMI 25 to 29.9 - should gain 15 to 25 pounds during pregnancy.
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