Fig. 1

Study design. Figure 1 shows the trial design and implementation of the trial data collection and intervention components over the course of the 34 months trial period. Repeated cross-sectional outcome data from surveys of pregnant women will be gathered on a weekly basis across all three sectors for the duration of the study. Baseline data will be collected for each of the three sectors from 7 months prior to the commencement of the intervention in the first sector to the start of the intervention in each sector. Stepped implementation of a 7-month practice change intervention will be delivered in a randomly selected order at six monthly intervals. Follow-up data will continue to be collected for all three sectors 7 months following completion of the practice change intervention in the third sector