“What Do You Need?” Formative Research to Develop a Comprehensive Maternal Needs Assessment Tool for Infant and Young Child Nourishment and Care in the United States

<b>Background/Objectives:</b> Despite substantial healthcare spending, U.S. mothers encounter fragmented support systems for infant feeding, care, and maternal mental health. While existing needs assessment instruments target parents of ill or preterm infants, no validated tool captures the full range of informational, psychosocial, and structural needs among mothers of healthy, full-term infants. This formative mixed-methods study sought to identify and prioritize maternal needs across multiple socioecological levels to guide the development of a comprehensive Maternal Needs Assessment Tool (MNAT). <b>Methods:</b> Guided by the socioecological model, six virtual focus groups were conducted with U.S. mothers of healthy infants < 2 years (analytic sample = 28). Thematic analysis in ATLAS.ti (Version 25) identified key needs, which informed the creation of a 10-domain Maternal Needs Assessment Ranking Questionnaire (MNARQ). Participants (<i>n</i> = 22) rated each domain's importance on a five-point scale; weighted mean ranks were calculated in SPSS (Version 30). <b>Results:</b> Seven overarching themes across ten domains emerged: infant and young child feeding and care, maternal psychosocial wellbeing, parenting knowledge and skills, interpersonal and community support, institutional assistance, and work-policy environments. The highest-ranked domains of need were complementary feeding, child development, care and health, social norms, networking and support, maternal mental health, and breastfeeding guidance. Mothers described pervasive informational confusion, inadequate professional and peer support, and institutional barriers such as limited postpartum follow-up, inflexible daycare policies, and WIC hurdles in formula substitution for infants with allergies. <b>Conclusions:</b> Maternal needs encompass intersecting personal, social, and structural factors. Findings will inform the development and validation of a national Maternal Needs Assessment Tool to guide integrated maternal and child health programs.