Table 5. Full-term development of in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) embryos derived from Second-oocytes.
| Exp. | Recovery period after surgery |
No. of used oocytes | No. of oocytes surviving after ICSI |
No. (%) * of oocytes with 2PN formed |
No. of embryos developed to two cells |
No. of transferred embryos (no. of recipients) |
No. (%) * [min–max] of offspring |
|---|---|---|---|---|---|---|---|
| IVF | Control | 141 | - | 139 (98.6) a | 139 | 89 (8) | 65 (73.0) a [33.3–100] |
| 10 days | 71 | - | 71 (100) a | 71 | 51 (6) | 24 (47.1) b [20.0–63.6] | |
| 20 days | 30 | - | 25 (83.3) b | 24 | 24 (3) | 22 (91.7) a [87.5–100] | |
| 30 days | 29 | - | 27 (93.1) ab | 27 | 27 (3) | 22 (81.5) a [62.5–90.0] | |
| ICSI | Control | 141 | 82 | 82 (100) c | 80 | 70 (7) | 41 (58.6) b [28.6–70.0] |
| 10 days | 41 | 24 | 22 (91.7) c | 20 | 17 (2) | 11 (64.7) b [54.5–83.3] | |
| 20 days | 83 | 46 | 44 (95.7) c | 36 | 32 (4) | 22 (68.8) b [40.0–75.0] | |
| 30 days | 43 | 23 | 22 (95.7) c | 22 | 21 (3) | 12 (57.1) b [20.0–100] |
Some experimental groups were not performed with control at the same time. PN: Pronuclei. * Different letters indicate significant differences by Pearson’s Chi-square test (P < 0.01).