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  • Title: Blastocyst quality scoring based on morphologic grading correlates with cell number.
    Author: Matsuura K, Hayashi N, Takiue C, Hirata R, Habara T, Naruse K.
    Journal: Fertil Steril; 2010 Aug; 94(3):1135-7. PubMed ID: 20079898.
    Abstract:
    Blastocyst quality score (BQS), first reported by Rehman et al., is a numerical blastocyst-morphology grading system based on the criteria established by Gardner and Schoolcraft. We demonstrate a positive correlation between the calculated BQS score and cell number by staining thawed human embryos and suggest that BQS can be applied to evaluate culture systems clinically.
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