Table 1.
Distribution of Diagnostic Categories and Frequency of Azoospermia in a Group of Infertile Men Attending a Tertiary Center for Male Reproduction.
| Category | Number and Absolute Frequencies; N (%) | Men Presenting with Azoospermia; Number and Relative Frequencies, N (%) |
| Varicocele | 629 (26.4) | 32 (5.1) |
| Post-infectious§ | 161 (6.9) | 57 (35.4) |
| Endocrine | 54 (2.3) | 26 (48.1) |
| Ejaculatory dysfunction | 28 (1.1) | NA |
| Systemic disease | 11 (0.4) | 2 (18.1) |
| Idiopathic‖‖ | 645 (27.1) | 178 (27.6) |
| Immunologic | 54 (2.2) | None |
| Obstruction¶ | 259 (10.9) | 244 (94.2) |
| Cancer | 11 (0.4) | 4 (36.3) |
| Cryptorchidism | 342 (14.4) | 174 (50.8) |
| Genetic‡ | 189 (7.9) | 118 (62.4) |
| TOTAL | 2,383 (100.0) | 835 (35.0) |
| Obstructive Azoospermia; N (%) | 302 (36.1) | |
| Nonobstructive Azoospermia; N (%) | 507 (60.7) |
§ include orchitis and sexually transmitted diseases; ‖‖include testicular failure and idiopathic obstruction; ¶ include vasectomy and ejaculatory duct obstruction; ‡include congenital absence of vas deferens, Yq microdeletion and Klinefelter syndrome.