title: Blastocyst quality scoring based on morphologic grading correlates with cell number.
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.
authors.affiliation: Cardiovascular Physiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Matsuura
authors.forename: Nobuyoshi
authors.initials: N
authors.lastname: Hayashi
authors.forename: Chisato
authors.initials: C
authors.lastname: Takiue
authors.forename: Rei
authors.initials: R
authors.lastname: Hirata
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Habara
authors.forename: Keiji
authors.initials: K
authors.lastname: Naruse
mesh_terms: D001755:Blastocyst / Q000166:cytology*; D002452:Cell Count; D048430:Cell Shape / Q000502:physiology; D002478:Cells, Cultured; D002970:Cleavage Stage, Ovum / Q000166:cytology* / Q000502:physiology; D046149:Embryo Culture Techniques / Q000379:methods / Q000592:standards; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D011247:Pregnancy; D011786:Quality Control; D012107:Research Design