PROJECT SUMMARY/ABSTRACT For this administrative supplement to our K12 BIRCWH grant, UC Davis is requesting support to allow our fourth Scholar, Dr. Adrienne Hoyt-Austin whose background meets the NIH criteria for being from an underrepresented minority group and disadvantaged background in interdisciplinary women’s health and sex differences research. This proposed Scholar is within 6 years of a terminal degree and will engage in interdisciplinary women’s health and/or sex/gender disparities, team science-based research and create an independent development plan for her pathway to independence. Her research focus is to addressing health disparities by improving evidence-based breastfeeding support to increase breastfeeding rates, exclusivity, and duration, especially amongst racial and ethnic minorities. This research addresses two of the BIRCWH crosscutting themes: 1) health disparities; and 2) interdisciplinary research. Over the past 21 years, the UC Davis BIRCWH program has trained a sizeable, diverse cadre of interdisciplinary researchers in women’s health and sex differences and heightened the visibility and prominence of this research. Led by Dr. Nancy Lane, we continue to build on this strong foundation to increase UC Davis BIRCWH innovation and impact by fostering an academically stimulating and nurturing environment that facilitates our objectives. Our short-term BIRCWH objectives are to: 1) provide in-depth, individualized training and team-based interdisciplinary mentoring to support the independent career development of Scholars in interdisciplinary women’s health and sex differences research; and 2) advance and achieve high-impact women’s health and sex/gender differences research by establishing cross-disciplinary collaborations with the UC Davis schools. Our long-term objectives are to: 1) improve women’s health by enhancing understanding of the unique aspects of female sex and gender and then translating this knowledge to clinical practice; 2) develop transformative interdisciplinary team science for women’s health and sex/gender disparities research; and 3) train leaders in interdisciplinary women’s health and sex differences research. To accomplish the objectives for this supplement, our proposed BIRCWH Scholar will continue to participate in: 1) team-based, interdisciplinary mentored research and career development activities; 2) core courses on grant writing, biostatistics, team science and responsible conduct of research; 3) supplemental courses tailored to her needs and interests; 4) integrated journal clubs; 5) monthly meetings with the PI and RDs to discuss research and career progress; 6) an annual symposium of Northern California BIRCWH programs; and 7) the School of Medicine Mentoring Academy to optimize mentoring experiences. To support this scholar, our BIRCWH program will continue to leverage campus expertise in the topical areas of her research.