A comparison of morphokinetic markers predicting blastocyst formation and implantation potential from two large clinical data sets. Academic Article uri icon

Overview

abstract

  • PURPOSE: To demonstrate whether the standard morphokinetic markers used for embryo selection have a similar relationship to blastocyst formation and implantation in two large clinical data sets. METHODS: This is a retrospective cohort analysis striving to answer two distinct questions utilizing data sets from two large IVF clinics. Blastocysts (BL) and implanted blastocysts (I) in both clinics, IVI-Valencia (BL = 11,414, I = 479) and WMC (BL = 15,902; I = 337), were cultured in a time-lapse system (EmbryoScope, Vitrolife, Sweden). The study was designed to assess the relationship between early morphokinetic hallmarks and BL development, with a secondary analysis of implantation rates following single-embryo day 3 and day 5 transfers. RESULTS: We performed a detailed graphical analysis for t3, t5, duration of the second cell cycle (cc2) (t3-t2), and the ratio (t5-t3)/(t5-t2). The t5 timing was not affected between the clinics. However, Weill Cornell Medicine's (WCM) proportions were significantly affected by having BL vs. not. A significant decrease of blastocysts with longer t5 in WCM data, while t5 was more informative in the IVI data set for the implantation rate. CONCLUSIONS: Morphokinetic intervals for early cleavages were distributed differently between the clinics. Incorporation of embryo-selection algorithms depends on the individual clinic's selected developmental hallmarks, all of which must be validated before incorporation into clinical practice.

publication date

  • January 22, 2019

Research

keywords

  • Blastocyst
  • Embryo Culture Techniques
  • Embryo Implantation
  • Embryonic Development

Identity

PubMed Central ID

  • PMC6505023

Scopus Document Identifier

  • 85060519348

Digital Object Identifier (DOI)

  • 10.1016/j.rbmo.2017.06.022

PubMed ID

  • 30671702

Additional Document Info

volume

  • 36

issue

  • 4