295 © Springer Nature Switzerland AG 2021 R. Kuersten-Hogan, J. P. McHale (eds.), Prenatal Family Dynamics, https://doi.org/10.1007/978-3-030-51988-9_14 Chapter 14 A Prenatal Intervention to Support Coparenting in Unmarried African American Family Systems James P. McHale, Carla Stover, and Katherine McKay In this chapter, we present the development of a culturally and community-grounded prenatal intervention developed to support coparenting alliances in lower socioeco- nomic African American families where parents are unmarried 1 and may be non-co- residential. We will detail the progression of the initiative, from its initial inception based on a review of current available interventions and on active engagement with the community to better understand family circumstances through pilot implemen- tation and refnement and fnally to implementation of a large ongoing randomized trial. Our aims are to provide insights into what families and community partners have taught us about delivering a culturally competent coparenting intervention. As part of this chronicling, we also provide an overview of our process in obtaining important prenatal and postnatal family data to evaluate the intervention’s impact and object lessons learned from that undertaking. 1 Unmarried families are frequently called “fragile families” in the literature (Garfnkel et al. 2001). For reasons we hope will become clear, we have chosen not to employ this term in the current manuscript, refecting a shift we have made in our own work over time to highlighting family strengths rather than family fragility. J. P. McHale (*) Family Study Center, Department of Psychology, University of South Florida, St. Petersburg campus, St. Petersburg, FL, USA e-mail: jmchale@usf.edu C. Stover Child Study Center, Yale University School of Medicine, New Haven, CT, USA e-mail: Carla.stover@yale.edu K. McKay Private Practice, Saint Petersburg, FL, USA e-mail: Kmckay@drkatherinemckay.com