Limitations
Maximum variation sampling for qualitative data prevented comparison of findings across women with different numbers of children, different ethnic groups, and different levels of socioeconomic status. Yet our approach allowed us to identify contextual and implementation factors which were common across most groups and we were sometimes able to identify differences between marginalized and less marginalized participants. The short time frame for training and implementing the intervention affected our ability to support and supervise data collection and meant we were unable to integrate learning from process data into iterative development of intervention and implementation methods. There may have been an underestimation in the number of calls made to schedule the VC and support women. Focus group discussion data suggest that sometimes so many calls were made that counselors did not log them. Our conservative estimates of call logs already indicate a high number of calls, so we feel this is not a major limitation.