The public health impact of this project was far-reaching. RBT+WHC aimed to fill a critical gap in substance use treatment research in a social structure where women are disproportionately disenfranchised from receiving healthcare compared with men. Furthermore, this initial study laid the foundation for a full-scale RCT to examine the impact of RBT+WHC on an array of maternal and neonatal outcomes, within the population of pregnant Coloured as well as Black and White South African women.