RBC counts (A), hemoglobin (B), MCH (C), serum transferrin (Tf) saturation (D), and serum ferritin (E) in 47 pregnant women (study 1) divided according to gestational period into group I (21–24 weeks; n = 20), group II (25–28 weeks; n = 9), group III (29–32 weeks; n = 11), and group IV (33–36 weeks; n = 7). *P < 0.05 versus group I; **P < 0.001 versus group I; #P < 0.05 versus group II. RBC counts (A), hemoglobin (B), MCH (C), serum transferrin (Tf) saturation (D), and serum ferritin (E) in 47 pregnant women (study 1) divided according to gestational period into group I (21–24 weeks; n = 20), group II (25–28 weeks; n = 9), group III (29–32 weeks; n = 11), and group IV (33–36 weeks; n = 7). *P < 0.05 versus group I; **P < 0.001 versus group I; #P < 0.05 versus group II. Kunihiko Hashimoto et al. Dia Care 2008;31:1945-1948 ©2008 by American Diabetes Association