Table IVa. Baseline and outcome characteristics per oocyte collection cycle (OCC).
| PGD group | control group | p-values | |
| 2001-2005 | 2001-2005 | ||
| mean age | 34.4 (SD 4.9) | 32.2 (SD 4.8) | p < 0.01 |
|---|---|---|---|
| no. of oocyte collection cycles (OCC) | 2252 | 1970 | |
| no. of transfer cycles in OCC | 1596 | 1794 | |
| transfer rate (% of OCC) | 70.9% | 91.1% | p < 0.01 |
| delivery rate per OCC | 17.6% | 29.6% | p < 0.01 |
| delivery rate per ET | 24.9% | 32.6% | p < 0.01 |
| number of deliveries | 397 | 584 | |
| number of children born | 473 | 712 | |
| no. of cycles with cryopreservation | 318 | 1051 | |
| cryopreservation rate per transfer cycle (%) | 19.9% | 58.6% | p < 0.01 |
| no. of embryos frozen | 811 | 3559 | |
| mean no. of embryos frozen | 2.6 (SD 2.3) | 3.4 (SD 2.4) | p < 0.01 |