Figure 4. Monthly changes in augmentation index at heart rate of 75/min, central and peripheral blood pressure.

Monthly [10⁺⁰–13⁺⁶ weeks (n = 145), 14⁺⁰–17⁺⁶ weeks (n = 56 ), 18⁺⁰–21⁺⁶ weeks (n = 55 ), 22⁺⁰–25⁺⁶ weeks (n = 104), 26⁺⁰–29⁺⁶ weeks (n = 86), 30⁺⁰–33⁺⁶ weeks (n = 57 ) and 34⁺⁰–37⁺⁶ weeks of gestation (n = 38)] changes throughout pregnancy in: (a) augmentation index at heart rate 75 beats per minute (AIx-75), and (b) brachial and aortic blood pressures. Values represent mean values and error bars represent standard errors. Only one measurement from each woman is included. BP = blood pressure.