Table 2. Comparison of clinical outcomes based on whether or not mature oocytes were retrieved at the time of egg retrieval in Group B and C.
| Variable | B: oocyte failed from DF at retrieval | C: DF ovulated at retrieval | ||||
| B1 | B2 | P | C1 | C2 | P | |
| No. of oocyte retrieval cycles | 33 | 21 | 20 | 17 | ||
| No. of ET cycles | 33 | 19 | 20 | 15 | ||
| Age of women, years | 30.8 ± 38 | 31.1 ± 4.0 | 0.833 | 31.5 ± 3.1 | 31.5 ± 5.1 | 0.988 |
| No. of oocytes retrieved | 10.6 ± 5.1 | 7.2 ± 3.1 | 0.008 | 11.0 ± 5.7 | 7.9 ± 3.8 | 0.073 |
| No. of mature oocytes retrieved | 2.1 ± 1.0 | – | – | 2.0 ± 1.6 | – | |
| No. of immature oocytes retrieved | 8.2 ± 4.9 | 6.6 ± 3.1 | 0.210 | 8.56 ± 4.7 | 7.5 ± 3.8 | 0.453 |
| Maturation rate in vitro | 63.2 (170/269) | 69.8 (97/139) | 0.185 | 61.4 (105/171) | 69.3 (88/127) | 0.159 |
| Fertilization rate | 86.6 (187/216) | 79.0 (79/100) | 0.086 | 83.5 (111/133) | 87.9 (80/91) | 0.356 |
| No. of embryos transferred | 2.7 ± 1.0 | 2.6 ± 0.7 | 0.741 | 3.0 ± 1.1 | 2.5 ± 1.1 | 0.222 |
| Clinical pregnancy rate/ET cycle | 39.4 (13/33) | 26.3 (5/19) | 0.340 | 20.0 (4/20) | 33.3 (5/15) | 0.615 |
| Embryo implantation rate | 17.0 (15/88) | 14.3 (7/49) | 0.673 | 8.3 (5/60) | 13.2 (5/38) | 0.670 |
| live birth rate/clinical pregnancy | 76.9 (10/13) | 40.0 (2/5) | 0.352 | 75.0 (3/4) | 60.0 (3/5) | 0.633 |
| Miscarriage rate/clinical pregnancy | 23.1 (3/13) | 60.0 (3/5) | 0.352 | 25.0 (1/4) | 40.0 (2/5) | 0.633 |
Values are mean ± SD unless otherwise specified. Abbreviation: DF: dominant follicle. B1, C1: cycles with mature oocytes were retrieved from small follicles and embryos derived from oocytes matured in vivo and in vitro; B2, C2: cycles with only immature oocytes were retrieved from small follicles and embryos derived from oocytes matured in vitro.