A RCT of CenteringPregnancy on Birth Outcomes

Inclusion Criteria: 1. Pregnant women aged between 14-45 years 2. Entry prenatal care before 20 6/7 weeks gestational age (defined as attendance at the intake screening visit). Patients must be randomized by 23 6/7 weeks gestational age. Exclusion Criteria: 1. Medical complications of pregnancy that would preclude prenatal care provision by nurse practitioners or participation in group care * Pregestational diabetes, * Severe chronic hypertension requiring medication, * Morbid Obesity with BMI \>49.99 * Renal disease with baseline proteinuria \>1g/24 hours * Any disease requiring chronic immunosuppression (SLE, solid organ transplant) * Active pulmonary tuberculosis * Sickle cell anemia * Human Immunodeficiency Virus Infection * Other medical conditions that would exclude women from group care at the discretion of the PI 2. Pregnancy complications that would preclude prenatal care provision by nurse practitioners or participation in group care * Multiple gestation * Lethal fetal anomalies * Other pregnancy complications that would exclude women from group care at the discretion of the PI 3. Social and behavioral complications of pregnancy which would preclude prenatal care provision by nurse practitioners or participation in group care * Current incarceration * Severe psychiatric illness