Table 1. Development of nuclear transfer (NT) embryos derived from cumulus cells of a Japanese black cow using ovum pick-up (OPU)-derived and slaughterhouse-derived oocytes.
| Recipient oocytes | No. of NT embryos |
No. of cleaved embryos (%) |
No. of blastocysts (%) |
No. of embryos transferred |
No. of calves (%) |
No. surviving > 60 days |
|
| Source | Breed | ||||||
| Slaughterhouse | Unknown | 89 | 70 (78.7) | 32 (36.0) | 20 | 5 (25) | 3 (15) |
| OPU | Total | 112 | 101 (90.1) | 33 (29.5) | 10 | 5 (50) | 1 (20) |
| Japanese black | 70 | 64 (91.4) | 19 (27.1) | 7 | 2 (28) | 0 (0) | |
| Holstein | 42 | 37 (88.1) | 14 (33.3) | 3 | 3 (100) | 1 (33) | |