Effect of Prenatal and Postnatal Intervention Strategies on Breastfeeding Outcomes in Women With Excessive Weight (Ready, Set, Nourish Study)

Inclusion Criteria * Age 18 or older * Less than 37 weeks of pregnant with singleton fetus * Pre-pregnancy excessive weight (Body Mass Index ≥ 25 kg/m2) * Interested in breastfeeding * Willing to express colostrum from around 37 weeks of pregnancy if randomized to the prenatal intervention group * Willing to express human milk for sample collection during a 24-hour period * Willing to adhere to a meal plan for 5.5 months post-partum if randomized to the postnatal intervention group * Able to engage in study procedures for the first 24 months postpartum * Reside in Central Arkansas region Exclusion Criteria * Pre-existing conditions (e.g. diabetes, hypertension, heart disease, thyroid disorders); * Use of recreational drugs, tobacco, or 2 or more servings of alcohol per month * Food allergies, intolerances, or preferences interfering with the meal plan * Medical history including any contraindication to breastfeeding (medications or supplements incompatible with breastfeeding, substance use)Multiparous pregnancy * History of breast surgery or radiation * Congenital defects * Preeclampsia