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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

From: Subendometrial resistence and pulsatility index assessment of endometrial receptivity in assisted reproductive technology cycles

  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