The study was undertaken in four LGAs: Dange Shuni Goronyo and Silame (combined 2015 population, according to official Sokoto State estimates = 661,606) LGAs which were purposively selected as intervention LGAs; and Yabo LGA, the fourth (2015 population, according to official Sokoto State estimates = 167,971), was purposively selected as the counterfactual LGA. The selection criteria were that all LGAs had a high prevalence of malaria in pregnancy and that at one LGA each in the intervention group, was selected from each of the State's three senatorial zones.