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Effect of graded glycine intakes on F¹³CO2 (A, C) and plasma 5-oxoproline (B, D) during midgestation (A, B) and late (C, D) gestation in healthy pregnant women. There were 17 observations in 9 women (mid) or 19 observations in 8 women (late). Linear regression analysis was performed on midgestation data. Biphase linear regression crossover analysis was performed on late gestation data.
