By C.E. Huggins NEW YORK (Reuters Health) – Overweight and obese women who gain too few pounds, or even lose weight, during pregnancy may be putting their unborn child at risk, a new study suggests. “While many people recommend that weight loss in pregnancy, particularly for very obese women is ok . (there) may be adverse effects,” said Dr. Patrick Catalano, director of the Center for Reproductive Health at MetroHealth in Cleveland, Ohio. “We don’t have much data, in particular on body composition changes in overweight (or) obese women who lose weight,” said Catalano, who led the new study.