< 35 | 35–37 | 38–40 | 41–42 | ≥ 43 | Total | |
---|---|---|---|---|---|---|
Cycle, n | 292 | 405 | 613 | 490 | 682 | 2482 |
Maternal age(± SD)at ER | 32.1 ± 1.9 | 36.1 ± 0.8 | 39.2 ± 0.8 | 41.5 ± 0.5 | 44.3 ± 1.4 | 39.7 ± 4.1 |
Paternal age(± SD)at ER | 35.0 ± 4.9 | 37.9 ± 4.3 | 40.6 ± 4.4 | 43.0 ± 4.6 | 45.0 ± 5.1 | 41.2 ± 5.7 |
No. of previous ER(± SD) | 2.2 ± 2.0 a | 2.9 ± 2.7 b | 3.5 ± 3.5 c | 4.5 ± 4.1 d | 7.8 ± 7.2 e | 4.7 ± 5.2 |
No. of previous ET(± SD) | 1.6 ± 1.6 a | 2.3 ± 2.4 b | 2.7 ± 2.7 c | 3.2 ± 2.9 d | 4.3 ± 4.0 e | 3.0 ± 3.2 |
Etiology of infertility (%) | ||||||
Male factor | 29.7 | 25.4 | 25.9 | 27.5 | 21.6 | 25.4 |
Tubal factor | 2.1 | 5.0 | 4.5 | 5.8 | 5.7 | 4.9 |
Endometriosis | 5.5 | 3.8 | 4.2 | 2.6 | 3.7 | 3.8 |
Ovulation disorders | 4.1 a | 3.3 ab | 2.2 ab | 0.9 b | 2.3 ab | 2.4 |
Uterine or cervical factor | 3.8 | 4.0 | 4.9 | 6.0 | 7.0 | 5.4 |
Combination | 15.5 a | 13.6 a | 12.4 ab | 9.8 ab | 8.0 b | 11.3 |
Unknown | 39.0 a | 44.3 ab | 45.8 ab | 47.3 ab | 51.7 b | 46.6 |
Other | 0.3 | 0.5 | 0.2 | 0.2 | 0.2 | 0.1 |