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Table 2 Efficiency in the production of chimeras from ES cells injected into 4- to 8-cell and blastocyst stage embryos

From: Efficient production of chimeric mice from embryonic stem cells injected into 4- to 8-cell and blastocyst 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)