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Examples of evaluations of human blastocyst morphology. (A) High-quality expanded blastocyst: type A ICM, type A TE. (B) High-quality hatched blastocyst: type A ICM, type A TE. (C) Low-quality hatching blastocyst: type C ICM, type C TE. (D) Low-quality hatched blastocyst: type C ICM, type C TE. (A-D) × 100 magnification. ICM, inner cell mass; TE, trophectoderm.
