Table 2 Ultrasound parameters between two groups. (Uterine artery resistance index and uterine artery pulsatility index) at baseline, at day 6, 8 and 10 after controlled ovarian stimulation, at trigger day and at embryo transfer day. Mean values with standard deviation (SD). rhCG – recombinant Human chorionic gonadotropin

0.97 ± 0.16

0.92 ± 0.12

0.1

1.01 ± 0.15

0.94 ± 0.11

0.04

1.09 ± 0.14

0.97 ± 0.12

0.001

1.19 ± 0.16

1.07 ± 0.16

0.001

0.93 ± 0.10

0.88 ± 0.09

0.011

1.12 ± 0.12

1.02 ± 0.09

0.001

1.46 ± 0.51

1.33 ± 0.34

0,06

1.64 ± 0.45

1.47 ± 0.40

0,023

1.74 ± 0.47

1.44 ± 0.44

0.001

1.87 ± 0.43

1.51 ± 0.37

0.001

1.48 ± 0.38

1.18 ± 0.27

0.001

1.91 ± 0.54

1.49 ± 0.42

0.001