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Table 2 Comparison of pregnancy outcomes between the NC-IUI and COS-IUI groups

From: Controlled ovarian stimulation should not be preferred for male infertility treated with intrauterine insemination: a retrospective study

  NC-IUIa COS-IUI P-value
Totalb 1 follicleb1 ≥ 2 folliclesb2 a vs. b b1 vs. b2 a vs. b1 a vs. b2
n 425 176 93 83     
Clinical pregnancy (n (%)) 52 (12.2) 23* (13.1) 11(11.8) 12* (14.5) 0.787 0.658 1.000 0.588
Live birth (n (%)) 47 (11.1) 21* (11.9) 10(10.8) 11* (13.3) 0.778 0.647 1.000 0.572
Spontaneous abortion (n (%)) 3 (5.8) 2 (8.7) 1(9.1) 1(8.3) 0.639 1.000 0.546 0.574
Ectopic pregnancy (n (%)) 2 (3.7) 1* (4.3) 0 1* (8.3) 1.000 1.000 1.000 0.458
Multiple pregnancy (n (%)) 0 2* (8.7) 0 2*(16.7) 0.091 0.478 0.033#
  1. NC Natural cycle, COS Controlled ovarian stimulation; * including one heterotopic pregnancy; #denotes a statistically significant difference (P < 0.05)
  2. a, Group NC-IUI; b, Group COS-IUI; b1, Group 1 follicle; b2, Group ≥2 follicles