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Box-and-whiskers plots showing Delta A and Delta B in the control and fetal growth restriction (FGR) groups overall and according to gestational age (GA) at examination. Delta A and Delta B are shown in all control fetuses (a), in control fetuses ≤ 28 + 6 GA (b), and in control fetuses > 28 + 6 GA at examination (c). Delta A and Delta B are shown in all FGR fetuses (d), in FGR fetuses ≤ 28 + 6 GA (e), and in FGR fetuses > 28 + 6 GA at examination (f). ms = millisecond.
