New York (AP) A new report says the standard advice for how much weight a woman should gain during pregnancy may need to changed.

The rigorous and provocative study suggests that even accepted weight gains may raise the risk of having an overweight toddler.

Women in the study who gained the recommended amount of weight ran four times the risk of having a child who was overweight at age three, compared to women who gained less than the advised amount.

So what's a pregnant woman to do? The study's lead author says clearly, she shouldn't gain more weight than recommended.

But beyond that, Dr. Emily Oken of Harvard Medical School says it's too early to say whether women should try to gain less than the standards call for or shoot for the low end of the recommended range.

The study appears in the April issue of the American Journal of Obstetrics and Gynecology.