SNa/K ATPase T DC II [ HSP 70 t Embryo 6MC survival F Altered DNA * ) methylation? E I Embryo survival ( ?) (summer) ~ZZZ~IIZL IGF-1 I dO d7 d14 d21 d: No effect Embryo length Embryo Stage IFN-- secretion No effect Embryo survival (winter) Figure 5-1. Summary of the effects of IGF-1 on embryo development and post-transfer survival. See text for details. B No effect Cell number Cell allocation Apoptosis (+