Table 3 Basic characteristics and clinical outcomes of different dominant follicle size for unexplained infertility patients in LE-IUI cycles (\(\overline{x} \pm s\))
Group A:17–18.9 mm (n = 83) | Group B:19–21.0 mm (n = 211) | Group C: > 21.0 mm (n = 117) | P-value | |
|---|---|---|---|---|
Female age (year) | 30.66 ± 3.52 | 31.48 ± 3.45 | 31.06 ± 3.29 | 0.159 |
Male age (year) | 32.98 ± 4.21 | 33.72 ± 4.36 | 33.03 ± 4.31 | 0.244 |
Basel FSH (mIU/ml) | 7.46 ± 2.04 | 7.43 ± 1.87 | 7.16 ± 1.84 | 0.407 |
Basel LH (mIU/ml) | 4.93 ± 2.48 | 4.74 ± 2.09 | 5.05 ± 2.25 | 0.445 |
Female BMI (kg/m2) | 21.27 ± 2.80 | 21.37 ± 2.46 | 20.83 ± 2.48 | 0.168 |
Duration of infertility (years) | 3.267 ± 1.64 | 3.59 ± 1.88 | 3.25 ± 1.82 | 0.179 |
Infertility type, n (%) | ||||
Primary | 56 (67.5) | 143 (67.8) | 86 (73.5) | 0.513 |
Secondary | 27 (32.5) | 68 (32.2) | 31 (26.5) | 0.159 |
Endometrial thickness on trigger day (mm) | 9.81 ± 1.87 | 9.49 ± 2.02 | 9.42 ± 2.03 | 0.366 |
Dominant follicle size (mm) | 18.05 ± 0.52 | 19.91 ± 0.70 | 22.59 ± 1.05 | < 0.001 |
Number of follicles ≥ 14 mm | 1.49 ± 0.756 | 1.36 ± 0.59 | 1.44 ± 0.72 | 0.262 |
Number of follicles ≥ 16 mm | 1.35 ± 0.65 | 1.23 ± 0.48 | 1.33 ± 0.59 | 0.136 |
Number of follicles ≥ 18 mm | 0.90 ± 0.58 | 1.13 ± 0.36 | 1.21 ± 0.50 | < 0.001 |
TMCS (*106) | 108.10 ± 84.85 | 112.00 ± 89.61 | 123.35 ± 89.64 | 0.418 |
HCG positive rate, n (%) | 11 (13.3) | 25 (11.8) | 4 (3.4) | 0.023 |
Clinical pregnancy rate, n (%) | 9 (10.8) | 22 (10.4) | 4 (3.4) | 0.065 |
Live birth rate, n (%) | 8 (9.6) | 22 (10.4) | 4 (3.4) | 0.077 |
Multiple pregnancy rate, n (%) | 1 (11.1) | 0 | 0 | – |
Early miscarriage rate, n (%) | 1 (11.1) | 0 | 0 | – |