Table 2. Mean and standard deviation (SD) of augmentation pressure (AP) and augmentation at heart rate 75 beats per minute (AIx-75) in each trimester.

	First trimester	Second trimester	Third trimester	Total
	n = 154	n = 209	n = 178	n = 541
AP mean (SD)	3.89 (3.77)	3.35 (3.95)	3.35 (4.28)	3.50 (4.02)
AIx-75 mean (SD)	15.82 (10.98)	15.88 (10.60)	16.31 (1.59)	16.00 (11.02)