Fig. 1. The number and genotypes of embryos dissected from 9.5d.p.c. implantation sites generated by transfer of blastocysts from Lifr and gp130 double heterozygous intercross matings that were in diapause for 6 days. The numbers for wild type (+/+) and heterozygous (+/-) genotypes are combined (+). *Two of the four embryos were abnormal.