Table 2 Efficiency in the production of chimeras from ES cells injected into 4- to 8-cell and blastocyst stage embryos
Host embryo | No. injected embryos transferred | No. recipient mice | No. total born (%) | No. total chimeras (%) | No. total male (%) |
|---|---|---|---|---|---|
4- to 8- cell | 248 | 6 | 27 (10.89) | 12 (44.4) | 9 (75) |
blastocyst | 618 | 20 | 80 (12.9) | 42 (52.5) | 28 (66.7) |