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. 2012 Jul-Sep;6(3):47–54.

Table 5.

PI of uterine and umbilical arteries during uterine contractions and relaxations.

Variable	During Uterine relaxation		During Uterine contraction

	Control group N= 23	BD group N= 44	BF group N= 43	Control group N= 23	BD group N= 44	BF group N= 43
UtA-PI
Baseline	0.67±0.09	0.66±0.18	0.64±0.22	1.12±0.09^#	1.02±0.19^#	1.10±0.07^*^#
At 30 min	0.64±0.12	0.81±0.15^*	0.78±0.26^*	1.01±0.17^#	1.36±0.18^*^#	1.23±0.12^*^#
At 60 min	0.66±0.19	0.78±0.21^*	0.76±0.20^*	0.99±0.07^#	1.24±0.19^*^#	1.14±0.15^*^#
At 120 min	0.70±0.17	0.76±0.22^*	0.74±0.24^*	1.01±0.06^#	1.20±0.21^*^#	1.09±0.19^*^#

UA-PI
Baseline	0.81±0.19	0.79±0.21	0.81±0.18	0.99±0.23^#	0.96±0.18^#	0.97±0.21^#
At 30 min	0.77±0.16	0.82±0.21	0.81±0.22	0.97±0.21^#	1.04±0.27^#	0.99±0.31^#
At 60 min	0.79±0.14	0.80±0.09	0.82±0.17	0.98±0.25^#	1.01±0.18^#	0.98±0.27^#
At 120 min	0.80±0.11	0.81±0.23	0.82±0.21	0.97±0.19^#	0.96±0.17^#	0.97±0.25^#

Data expressed as mean (±SD),

^*

P<0.05 when compared control with either epidural groups;

^#

P<0.05 when compared between contraction and relaxation in the same group.