Fig 3. Placental and peripheral blood levels of angiogenic factors and effect of delivery method.

(A-C) Placental (orange, n = 121) and peripheral (green, n = 130) levels of angiogenic factors measured in this study. (D) Placental blood levels of Ang-1 and Tie-2 in women who had vaginal deliveries (blue, n = 54) or who underwent C-sections (red, n = 51). All levels are ln-transformed in nanograms/mL. Bars represent the mean and standard deviation. Student’s t-tests with Welch correction were performed to evaluate differences between the two compartments.