Interventions to Reduce Excess Weight Gain in Pregnancy

Inclusion Criteria: * Age 18-45 years * In first trimester of pregnancy * Must be willing to not join any other weight control program while in the study * BMI of 25-40 kg/m2 * Willingness and ability to attend support group meetings either in person or via web * Must be able to read, speak, and understand English Exclusion Criteria: * Carrying multiple fetuses * Gestational diabetes mellitus at study entry * Type 2 diabetes mellitus or blood glucose \>125 mg/dl at screening * Self reported current substance abuse * Current smoking * Alchol consumption of more than 1 drink per day * Preexisting medical conditions (includes bariatric surgery) or use of medications that would impact study involvement or outcomes testing * Eating disorder in the past 2 years * Depression or diagnosis of bipolar disorder * Concurrent participation in any other research study that would impact participation in this investigation