Table I.

Patients' sonographic characteristics in study groups

	Metformin group (n=35)	Aspirin group (n=35)	Control group (n=35)	p-value
MUAPI at 12 weeks of gestation	1.29 (+0.29)	1.32 (+0.40)	1.27 (+032)	0.813
MUAPI at 20 weeks of gestation	0.93 (+0.30)#	0.89 (+0.21)	1.10 (+0.30)*	0.005
MUAPI 20- MUAPI 12	-0.36 (+0.33)	-0.43 (+0.29)	-0.17 (+0.33)	0.002

MUAPI: Mean uterine artery pulsatility index.

^* p= 0.005 compare to aspirin group and p= 0.035 compare to metformin group.

^# p= 0.785 compare to aspirin group.