Purpose: To explore fathers' perceptions of behaviors used to support the provision of breast milk to hospitalized premature infants.Subjects: Sixteen English-speaking fathers who, each were at least 15 years of age, had a hospitalized premature infant between 24 and 32 weeks gestation and a partner who had decided to provide breast milk.Design: As part of a larger, exploratory study, a qualitative descriptive study was conducted to analyze fathers' perceived contributions to the process of providing breast milk. Methods: Fathers were interviewed with a semi-structured interview guide. All interviews were audiotaped, and verbatim transcripts were analyzed by using qualitative descriptive methods.Main Outcome Measure: Supportive behaviors as identified by fathers of hospitalized premature infants.Principal Results: Fathers described 3 types of behaviors used to support the provision of breast milk to their hospitalized premature infants: assistance with the pumping process, assumption of additional daily domestic responsibilities, and provision of moral support.Conclusions: Results from this study suggest several significant behaviors that fathers perceived they performed to support their partners' efforts to provide breast milk to their hospitalized premature infants.