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Sequential analysis of zona thickness during in vitro culture of human zygotes: Correlation with embryo quality, age, and implantation

1 May 1997

Abstract excerpt

Zona pellucida thickness was measured daily in zygotes and cleavage stage embryos. Measurements were performed on a Nikon inverted microscope equipped with Hoffman modulation optics, using an ocular micrometer. Zona thickness of each zygote/embryo was measured four times, the zygote/embryo was then "rolled over," and four more measurements were repeated for a total of eight. The zygotes/embryos were photographed...

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PMID: 9110320
DOI: 10.1002/(sici)1098-2795(199705)47:1<99::aid-mrd13>3.0.co;2-v

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