A new study of obese women who are pregnant is setting a tough new standard, instructing women to gain no weight at all during pregnancy. As Roni Rabin reports in Tuesday’s Science Times:

One fifth of pregnant women in the United States are obese, and more and more doctors are advising them to watch their weight if they want an easy pregnancy and smooth delivery. In May, the Institute of Medicine issued guidelines lowering the minimum recommended weight gain for obese women to 11 pounds, from 15. Now, a large four-year trial called the Healthy Moms study is going further, trying to keep obese pregnant women from gaining any weight at all.

To learn more, read the full story, “New Goal for the Obese: Zero Gain in Pregnancy,” and then please join the discussion below.