The Bridges to Moms program at Brigham and Women’s Hospital provides health and social services to pregnant women and new mothers experiencing housing instability or homelessness. ICH has been evaluating the impact of Bridges to Moms since 2018. Using program and medical records data for mothers and infants, ICH evaluated the program’s association with prenatal care engagement, gestational age at birth, birth weight, and length of newborn stay in the NICU, as well as on postpartum engagement in primary care for mom and baby. In previous years, interviews with program participants helped determine the most meaningful components of Bridges to Moms, as well as participant satisfaction and areas for improvement. The results of the evaluation will be used to seek additional funding for the program and to contribute to the literature on serving at-risk urban populations.