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Table 1 Comparison between the unexplained infertility group and the fertile control group according to the mean values of age, uterine arteries resistance index, pulsatility index, systolic/diastolic ratios, and endometrial thickness

From: Role of uterine artery Doppler in assessment of unexplained infertility

  Unexplained infertility group(n = 40)
Mean ± SD
Fertile control group (n = 30)
Mean ± SD
p value
Age (years) 26.9 ± 3.8 28.5 ± 4.9 0.194#
Resistance index 0.9 ± 0.06 0.6 ± 0.04 < 0.0001*
Pulsatility index 2.9 ± 0.7 1.5 ±0.4 < 0.0001*#
systolic/diastolic ratio (S/D): 8.0 ± 3.4 2.7 ± 0.3 < 0.0001*
Endometrial thickness 10.4 ± 2.4 12.1 ± 1.8 < 0.001*
  1. *Statistically Significant at 95% level of confidence
  2. #Student’s t test is used
  3. Mann-Whitney test is used