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Table 1 Characteristics of patients and cycles 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

Characteristics NC-IUI COS-IUI P -value
n 425 176  
Female age (years) 31.3 ± 4.8 31.1 ± 4.5 0.701
Male age (years) 33.6 ± 5.7 33.5 ± 5.3 0.935
Type of infertility (n (%))    0.264
 Primary 263 (61.9) 118 (67.0)  
 Secondary 162 (38.1) 58 (33.0)  
Duration of infertility (years) 2.9 ± 2.0 3.0 ± 2.2 0.648
No. of dominant follicles ≥16 mm 1.0 ± 0.1 1.5 ± 0.5 < 0.001*
Endometrium thickness (mm) 9.9 ± 1.5 9.9 ± 1.6 0.971
TPMSC (×106)
 pre-wash 55.8 ± 59.4 53.2 ± 37.8 0.405
 post-wash 18.1 ± 13.1 19.0 ± 12.0 0.175
Normal morphology (%)
 pre-wash 4.4 ± 2.0 4.4 ± 2.5 0.442
 post-wash 6.2 ± 2.3 6.2 ± 2.9 0.220
  1. NC Natural cycle, COS Controlled ovarian stimulation, TPMSC Total progressive motile sperm count; * denotes a statistically significant difference (P < 0.05)