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

	Non-Implantation N = 123 (72.8%)	Implantation N = 46 (27.2%)	t Test p value
Uterine Resistance Index (Ut RI)
Basal	0.97 ± 0.16	0.92 ± 0.12	0.1
Day 6	1.01 ± 0.15	0.94 ± 0.11	0.04
Day 8	1.09 ± 0.14	0.97 ± 0.12	0.001
Day 10	1.19 ± 0.16	1.07 ± 0.16	0.001
Trigger Day with rhCG	0.93 ± 0.10	0.88 ± 0.09	0.011
Embryo Transfer Day	1.12 ± 0.12	1.02 ± 0.09	0.001
Uterine Pulsatility Index (Ut PI)
Basal	1.46 ± 0.51	1.33 ± 0.34	0,06
Day 6	1.64 ± 0.45	1.47 ± 0.40	0,023
Day 8	1.74 ± 0.47	1.44 ± 0.44	0.001
Day 10	1.87 ± 0.43	1.51 ± 0.37	0.001
Trigger Day with rhCG	1.48 ± 0.38	1.18 ± 0.27	0.001
Embryo Transfer Day	1.91 ± 0.54	1.49 ± 0.42	0.001