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(A) Blastocysts produced parthenogenetically. (B) Differential staining of the blastocyst. (C) Primary colony of PGESCs. (D) Colony of PGESCs at passage 10. (E) Colony of PGESCs at passage 20. (F) Colony of PGESCs at passage 30. Scale bar, 200 μm, except for A and D, which is 100 μm.
