title: Time-lapse deselection model for human day 3 in vitro fertilization embryos: the combination of qualitative and quantitative measures of embryo growth.
abstract: OBJECTIVE
  To present a time-lapse deselection model involving both qualitative and quantitative parameters for assessing embryos on day 3.
  
  
  METHODS
  Retrospective cohort study and prospective validation.
  
  
  METHODS
  Private IVF center.
  
  
  METHODS
  A total of 270 embryos with known implantation data (KID) after day 3 transfer from 212 IVF/intracytoplasmic sperm injection (ICSI) cycles were retrospectively analyzed for building the proposed deselection model, followed by prospective validation using an additional 66 KID embryos.
  
  
  METHODS
  None.
  
  
  METHODS
  Morphological score on day 3, embryo morphokinetic parameters, abnormal cleavage patterns, and known implantation results.
  
  
  RESULTS
  All included embryos were categorized either retrospectively or prospectively into 7 grades (A+, A, B, C, D, E, F). Qualitative deselection parameters included poor conventional day 3 morphology, abnormal cleavage patterns identified via time-lapse monitoring, and <8 cells at 68 hours postinsemination. Quantitative parameters included time from pronuclear fading (PNF) to 5-cell stage and duration of 3-cell stage. KID implantation rates of embryos graded from A+ to F were 52.9%, 36.1%, 25.0%, 13.8%, 15.6%, 3.1%, and 0 respectively (area under the curve [AUC] = 0.762; 95% confidence interval [CI], 0.701-0.824), and a similar pattern was seen in either IVF (AUC = 0.721; 95% CI, 0.622-0.821) or ICSI embryos (AUC = 0.790; 95% CI, 0.711-0.868). Preliminary prospective validation using 66 KID embryos also showed statistically significant prediction in Medicult (AUC = 0.750; 95% CI, 0.588-0.912) and Vitrolife G-Series (AUC = 0.820; 95% CI, 0.671-0.969) suites of culture media.
  
  
  CONCLUSIONS
  The proposed model involving both qualitative and quantitative deselection effectively predicts day 3 embryo implantation potential and is applicable to all IVF embryos regardless of insemination method by using PNF as the reference starting time point.
authors.affiliation: Fertility North, Joondalup Private Hospital, Joondalup, Western Australia, Australia; School of Medical Sciences, Edith Cowan University, Joondalup, Western Australia, Australia. Electronic address: yanhe.liu@fertilitynorth.com.au.
authors.forename: Yanhe
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Fertility North, Joondalup Private Hospital, Joondalup, Western Australia, Australia.
authors.forename: Vincent
authors.initials: V
authors.lastname: Chapple
authors.affiliation: Fertility North, Joondalup Private Hospital, Joondalup, Western Australia, Australia.
authors.forename: Katie
authors.initials: K
authors.lastname: Feenan
authors.affiliation: School of Medical Sciences, Edith Cowan University, Joondalup, Western Australia, Australia.
authors.forename: Peter
authors.initials: P
authors.lastname: Roberts
authors.affiliation: Fertility North, Joondalup Private Hospital, Joondalup, Western Australia, Australia; School of Medical Sciences, Edith Cowan University, Joondalup, Western Australia, Australia.
authors.forename: Phillip
authors.initials: P
authors.lastname: Matson
mesh_terms: D000328:Adult; D019540:Area Under Curve; D001755:Blastocyst / Q000473:pathology*; D046149:Embryo Culture Techniques; D010064:Embryo Implantation; D004624:Embryo Transfer; D005260:Female; D005298:Fertility; D005307:Fertilization in Vitro; D006801:Humans; D007246:Infertility / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy*; D008853:Microscopy; D009024:Morphogenesis; D011237:Predictive Value of Tests; D011247:Pregnancy; D011446:Prospective Studies; D012372:ROC Curve; D015203:Reproducibility of Results; D012189:Retrospective Studies; D020554:Sperm Injections, Intracytoplasmic; D013997:Time Factors; D059008:Time-Lapse Imaging; D016896:Treatment Outcome
keywords: Embryo; deselection; implantation; pronuclear fading; time-lapse