Concentrations of leukocytes in fetal arterial cord blood at 36 h (A) and 120 h (B). Blue symbols, single IA AZ administration; orange symbols, repeated maternal i.v. AZ administrations. The horizontal bars represent group means. *, significant difference (P < 0.05) in neutrophil concentrations in fetal arterial cord blood at 120 h after treatment initiation between the single IA AZ and repeated maternal i.v. AZ groups; +, significant difference (P < 0.05) in the neutrophil concentration at 120 h relative to the concentration at 36 h in the repeated maternal i.v. AZ group. NEUT, neutrophils; LYMPH, lymphocytes; MONO, monocytes; EOSIN, eosinophils.