| Table 3. Summary of the origin of the aneuploidies. | |||||
| # Embryo |
maternal trisomy | Paternal trisomy | maternal monosomy | ||
|---|---|---|---|---|---|
| 1:1:1 Allelic pattern |
2:1 Allelic pattern |
1:1:1 Allelic pattern |
2:1 Allelic pattern |
||
| 2 | Chrs 2, 5, 6, 18 |
||||
| 3 | Chr 13 | Chr 9 | Chrs 10, 11 | ||
| 4 | Chrs 13, 20 |
Chr 2 | Chr 12 | ||
| 5 | Chr 8 | Chr 11 | Chrs 12, 16 |
Chr 18 | Chrs 9, 22 |
| 6 | Chr 20 | Chrs 14, 19 | |||
| 7 | Chr 1 | ||||
| 8 | Chrs 8, 20 | Chr 9 | Chrs 2, 12, 13, 21 |
||
The proportion of oocytes and spermatozoa with probable disomies in meiosis I was equal. The monosomies could also be meiotic or post fertilization; but since they all were of maternal origin, they most likely occurred in meiosis II post ICSI procedure.