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Table 3 Pregnancy outcomes

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)
Odd ratio
(95% CI)
P value
No of completed cycles 211 210   
Clinical pregnancy/cycle 40/211(18.96%) 24/210(11.43%) 1.81(1.05, 3.13) 0.031
Cumulative pregnancy rate 40/106(37.73%) 24/105(22.86%) 2.05(1.12, 3.73) 0.019
Ongoing pregnancy rate 35/106(33.02%) 20/105(19.05%) 2.09(1.11, 3.95) 0.02
Abortion rate 5/40(12.5%) 4/24(16.67%) 0.71(0.17, 2.97) 0.926
Multiple pregnancy rate 4/40(10%) 3/24(12.5%) 0.78(0.16, 3.82) 0.756
Ectopic pregnancy rate 0/40(0%) 0/24(0%) NA NA
OHSS 0/106 (0%) 0/105(0%) NA NA
  1. Values are expressed as n/n (%)
  2. CI = confidence interval, OHSS = ovarian hyperstimulation syndrome.