A Low Glycemic Load Diet During Pregnancy in Overweight Women

Inclusion Criteria: * Pregnant women with prepregnant or first trimester BMI equal to or greater than 25 kg/m2 and less than 45 kg/m2 * Singleton pregnancy * Willing to consume the diets for duration of pregnancy * Participant to be at week 28 or less of pregnancy at baseline visit Exclusion Criteria: * Smoking during pregnancy * Major medical illness (e.g., diabetes mellitus, hypertension, thyroid disease) * Patients taking prescription medication known to affect body weight * Alcohol consumption during pregnancy * Patients who declare their intention to deliver infants in the environment outside of Beth Israel Deaconess Medical Center, Boston * High level of physical activity