Maternal BMI and triceps skinfold as predictors of alkaline phosphatase activity or gene expression. A, Maternal BMI was related to microvillous plasma membrane alkaline phosphatase activity (B (95% CI) 0.10 (0.00, 0.20), p= 0.05) B, Maternal triceps skinfold was related to microvillous plasma membrane alkaline phosphatase activity (B (95% CI), 0.15 (0.05, 0.24), P > 0.002). C, The relationship between maternal BMI and placental alkaline phosphatase gene expression B (95% CI) 0.18 (-0.02, 0.38) P = 0.08. D, Maternal triceps skinfold was related to placental alkaline phosphatase gene expression (B (95% CI) 0.18 (-0.02, 0.38), P = 0.02).