1. Sex and Gender: Toward Transforming Scientific Practice. L. Zachary DuBois, Stacey A. Ritz, Margaret M. McCarthy, and Anelis Kaiser Trujillo.- 2. Entanglement of Gender/Sex Dynamics in Basic and Developmental Systems Biology. Colin J. Saldanha, Gillian R. Bentley, Charlotte A. Cornil, Geert J. de Vries, Holly Dunsworth, Margaret M. McCarthy, Rebecca M. Shansky, Lynnette Leidy Sievert, and Catherine S. Woolley.- 3. How Do Sex Differences in the Brain Help Our Understanding of Sex and Gender in Humans? Geert J. de Vries.- 4. How Can Gender/Sex Entanglement Inform Our Understanding of Human Evolutionary Biology? Holly Dunsworth and Libby Ware.- 5. Operationalization, Measurement, and Interpretation of Sex/Gender: Transcending Binaries and Accounting for Context and Entanglement. Stacey A. Ritz, Greta Bauer, Dorte M. Christiansen, Annie Duchesne, Anelis Kaiser Trujillo, and Donna L. Maney.- 6. Gender and Sex Entanglement in Neuroscience: A Neurofeminist Perspective. Annie Duchesne.- 7. Intersectionality, Sex/Gender Entanglement, and Research Design. Greta Bauer.- 8. Gender/Sex Dynamics in Human Biomedical and Clinical Research. Robert-Paul Juster, Lisa Bowleg, Lu Ciccia, Joshua B. Rubin, Carla Sanchis-Segura, Susann Schweiger, Eric Vilain, and Tonia Poteat.- 9. The Impossible Task of Disentangling Gender/Sex from Racialized and Other Marginalized and Oppressed Intersections: A Structural Intersectionality Approach to Health Inequities. Lisa Bowleg, Arianne N. Malekzadeh, and Katarina E. AuBuchon.- 10. Sex and Gender Should Be Considered Continuous Variables in Cancer Research. Wei Yang, Jason Wong, and Joshua B. Rubin.- 11. Gender, Sex, and Gender/Sex Entanglement in Transgender Health Equity Research. Tonia Poteat and Lu Ciccia.- 12. Gender, Sex, and Their Entanglement: From Scientific Research to Policy and Practice. Alexandra Brewis, Paisley Currah, L. Zachary DuBois, Lorraine Greaves, Katharina Hoppe, Katrina Karkazis, Madeleine Pape, Paula-Irene Villa, Amber Wutich.- 13. SABV Research Policies: From Distinctions to Entanglements. Madeleine Pape.- 14. How Could a Gender Transformative Lens Foster the Integration of Sex/Gender into More Equitable Policy and Practice? Lorraine Greaves.- 15. Sex as a State Effect. Paisley Currah.