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Calcium intake of pregnant women. Squares indicate the dietary folate intake; triangles indicate the total intake. The dotted vertical lines represent the estimated average requirement (EAR: 750 mg/d) and recommended daily allowance (RDA: 950 mg/d) for women aged 25 year and older. a = mean with standard deviation (SD); b = median with 90% range. Expect study I [83]. Generation R study [84]. Voortman et al. [57].
