PROBLEM TO BE SOLVED: To provide a screening method or the like for selecting a nuclear transplantation embryo having high possibility of pregnancy and procreation after the transplantation, that is, the nuclear transplantation embryo having high ontogenic ability.;SOLUTION: The method for screening the mammal nuclear transplantation embryo includes: a collecting step for collecting a trophic membrane cell from the nuclear transplantation embryo of a mammal; and a measuring step for measuring (a) an expression level of a protein having a specific amino acid sequence, or an amino acid sequence obtained by adding, deleting or substituting one or more amino acids to, from or with the amino acid sequence, or (b) a transcription level of the gene encoding the protein.;COPYRIGHT: (C)2010,JPO&INPIT
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