We selected seven genes of known physiological importance to the implantation to validate the RNA - seq results; five genes were associated with down - regulation of IFNT signaling in clones on gestation d18 (IFN.tau.c1, IFTN2, CXCL9, CXCL10, and IFI47), and two genes were up - regulated in d - 34
chorion from cloned samples (C3 and IL6).