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Embryo Culture and Selection: Morphological Criteria

  • Aparna Hegde
  • Barry BehrEmail author
Protocol
Part of the Methods in Molecular Biology book series (MIMB, volume 1154)

Abstract

In this chapter, we have outlined the various morphological criteria for selection of the best embryo at each important milestone encountered in the progress from the oocyte to the blastocyst. As Gerris et al. stated, a combination of one, two, or even three selection points should lead to a more accurate selection of the best embryo, as no one criterion is better than the other. An embryo that fails to meet the entire set of selection criteria must be avoided as culture cannot correct an impaired embryo.

Key words

Embryo grading Oocyte quality Pronuclear morphology Early cleavage Day 2 scoring Day 3 scoring Day 5/6 scoring Cumulative scoring 

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Division of Reproductive Endocrinology and Infertility, Department of OB/GYNStanford UniversityStanfordUSA

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