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Table 2 Intrauterine insemination cycle characteristics

From: Extended letrozole regimen versus clomiphene citrate for superovulation in patients with unexplained infertility undergoing intrauterine insemination: A randomized controlled trial

  Extended letrozole group
(n = 106)
Clomiphene citrate group
(n = 105)
P value
No. of cycles completed 211 210  
No. of follicles > 18 mm 2.24 ± 0.80 2.13 ± 0.76 0.154
Days of HCG administration 12.35 ± 1.05 12.50 ± 1.10 0.132
Endometrial thickness on HCG day (mm) 9.10 ± 1.84 8.18 ± 1.93 <0.001
Serum E 2 on HCG day (pg/ml) 356 ± 151 822 ± 302 <0.001
  1. Values are expressed as mean ± SD