Fig. 3From: Excess risk of preterm birth with periconceptional iron supplementation in a malaria endemic area: analysis of secondary data on birth outcomes in a double blind randomized controlled safety trial in Burkina FasoGestation at birth by directly observed treatment adherence based on percentage of scheduled treatments received. Upper horizontal line: 37 weeks gestation; lower horizontal line 34 weeks gestation. Stillbirths plotted with open symbolsBack to article page