In this article, we focus on the first wave of outcomes in a pilot‐phase randomized control trial of a home‐based intervention for infants and their families: Minding the Baby, an interdisciplinary, mentalization‐based intervention in which home‐visiting services are provided by a team which includes a nurse practitioner and a clinical social worker. Families are recruited during mother's pregnancy and continue through the child's second birthday. Analyses revealed that intervention families were more likely to be on track with immunization schedules at 12 months, had lower rates of rapid subsequent childbearing, and were less likely to be referred to child protective services. In addition, mother–infant interactions were less lilkely to be disrupted at 4 months when mothers were teenagers, and all intervention infants were more likely to be securely attached and less likely to be disorganized in relation to attachment at 1 year of age. Finally, mothers’ capacity to to reflect on their own and their child's experience improved over the course of the intervention in the most high‐risk mothers.