| Age < 35 (n = 213) | Age ≥ 35 (n = 123) | P value |
---|---|---|---|
Chronologic age (years) | 30.8 ± 0.2 | 38.6 ± 0.2 | < 0.001a |
Baseline FSH level (IU/L) | 7.60 ± 0.26 | 9.63 ± 0.47 | < 0.001a |
Antral follicle count | 7.8 ± 0.3 | 4.2 ± 0.3 | < 0.001a |
Baseline AMH level (ng/ml) | 2.73 ± 0.13 | 1.85 ± 0.15 | < 0.001a |
Duration of infertility (years) | 3.2 ± 0.2 | 4.7 ± 0.3 | < 0.001a |
Body mass index (kg/m2) | 21.4 ± 0.2 | 22.0 ± 0.3 | 0.086a |
Etiology of infertility | Â | Â | Â |
   Tubal factor | 31 (14.6%) | 22 (17.9%) | 0.519b |
   Other female factor | 31 (14.6%) | 35 (28.5%) | 0.003b |
   Male factor | 111 (52.4%) | 40 (32.5%) | < 0.001b |
   Mixed | 34 (16.0%) | 24 (19.5%) | 0.504b |
   Unexplained | 6 (2.8%) | 2 (1.6%) | 0.922c |