Table 2.
Laboratory and clinical outcomes of oocytes derived from follicles developed to or approaching preovulatory size (Group A) or from follicles not exceeding 13 mm at the time of hCG triggering (Group B)
| Group A | Group B | P | |
|---|---|---|---|
| No. of OPU | 315 | 204 | |
| No. of injected oocytes | 1907 | 561 | |
| Fertilization rate (no.) | 72.8 % (1388/1907) | 75.9 % (426/561) | 0.137 |
| Rate of high quality embryos (no.) | 64.3 % (892/1388) | 63.8 % (272/426) | 0.876 |
| Mean ± SD of embryos transferred | 2.0 ± 0.5 | 1.5 ± 0.7 | p < 0.0001 |
| Pregnancy rate/OPU (no.) | 37.5 % (118/315) | 27.0 % (55/204) | p = 0.013 |
| Pregnancy rate/ET (no.) | 38.4 % (118/307) | 29.4 % (55/187) | p = 0.041 |
| Implantation rate (no.) | 23.7 % (147/620) | 20.8 % (64/308) | 0.316 |
| Miscarriage rate (no.) | 16.1 % (19/118) | 20.0 % (11/55) | 0.528 |
| Rate of babies born per transferred embryo (no.) | 19.5 % (121/620) | 16.9 % (52/308) | 0.332 |