Figure 2From: Effect of iron content on the tolerability of prenatal multivitamins in pregnancy Rates of adherence between 2 prenatal multivitamin groups, represented as Kaplan-Meier survival curves and based on the proportion of subjects with standard adherence (80% or greater pill intake), once supplementation commenced. (Black solid line) 35 mg iron group, n = 57. (Black broken line) 60 mg iron group, n = 47.Back to article page