The object of this study is to define the part played by maternal iron-deficiency anaemia in the pathogenesis of iron deficiency anaemia in infancy, a condition commonly found in Cape Town (Lanzkowsky and McKenzie, 1959; Lanzkowsky, 1959 and 1960a). A number of early reports on the effect of maternal iron-deficiency anaemia on the newborn have indicated that maternal anaemia does not cause anae...