Table 2. Spectrum of abnormal chromosomal karyotype in miscarried conceptus: type and frequency variations between paternal age groups.
| Variables | Paternal age (years) | Total frequency (%) | |||||
| 20- | 25- | 30- | 35- | 40- | 45-60 | ||
| Trisomy | 73.1 (407/557) | ||||||
| Single | 8 | 49 | 98 | 106 | 80 | 25 | |
| Multiple | 0 | 4 | 4 | 7 | 4 | 2 | |
| Trisomy and duplication/deletion | 1 | 3 | 5 | 6 | 5 | 0 | |
| Monosomy | 5.7 (32/557) | ||||||
| allosome | 2 | 11 | 8 | 5 | 0 | 0 | |
| autosome | 0 | 2 | 1 | 1 | 2 | 0 | |
| Structural abnormalities | 9.0 (50/557) | ||||||
| Duplication or deletion | 2 | 16 | 17 | 6 | 1 | 2 | |
| Complex abnormalities | 0 | 0 | 1 | 3 | 1 | 1 | |
| Triploidy | 2 | 12 | 11 | 4 | 4 | 0 | 5.9 (33/557) |
| Mosaicism | 1 | 11 | 9 | 8 | 3 | 3 | 6.3 (35/557) |
| Total | 16 | 108 | 154 | 146 | 100 | 33 | – |
| Total frequency (%) | 53.3 (16/30) | 45.4 (108/238) | 54.6 (154/282) | 68.9 (146/212) | 80.0 (100/125) | 86.8 (33/38) | 60.2 (557/925) |
Values are numbers and frequencies.