Personalized Management of Body Weight During Pregnancy

Inclusion Criteria: * Are pregnant. * Are between 18 and 40 years old. * Have a BMI (a number calculated from your height and weight) equal to or above 25kg/m2. * Establish prenatal care before 12 weeks of your pregnancy. * Can read, speak and understand English. Exclusion Criteria: * Do not plan to deliver your baby at Woman's Hospital, Baton Rouge, LA * Are pregnant with more than one infant. * Have habitually smoked during the last 6 months. * Currently abuse or have abused illegal or prescription drugs in the last 6 months. * Consume more than 2 alcoholic drinks per week. * Are unwilling to avoid pregnancy for 12 months following delivery. * Are unwilling to enroll your baby in the 12 month follow-up testing planned in this study. * Are planning to move out of the area within the next 2 years or plan to be out of the study area for more than 1 month in the next year. * Are unwilling to be assigned at random to any of the intervention groups. * Are planning to terminate your pregnancy. * Are planning to give your baby up for adoption. * Are pregnant with a baby who has a known fetal anomaly. * Have a reason that exercising is unsafe (determined by your physician or study staff). * Have had or plan to have bariatric surgery within 1 year of your expected delivery. * Currently have or have a history of the following: * 3 or more first trimester miscarriages * High blood pressure * Type 1 diabetes * Diagnosis of pregnancy related diabetes during screening * HIV or AIDS * Psychotic disorder, major depressive episode, bipolar disorder or eating disorder * Any other pregnancy, blood, heart, lung, hormone, or digestive problem that your doctor considers unsafe for participation in this study