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Relationship between Fv/M MPE ratio and fetal weight. (A–I) Correlation between fetal vein/maternal artery (Fv/M) mole percent excess (MPE) ratio of (1-13C) valine, (1-13C) leucine, (1-13C) isoleucine, [Methyl-2H3] methionine, [U-13C4] threonine, [1-13C] phenylalanine, [4,4,5,5-2H4] lysine, [Ring 2-13C] histidine, and [Indole-2H5] tryptophan and fetal weight in control (n = 8) and MNR (n = 11) baboons at GD140. Pearson correlation coefficient (r).
