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COMPARATIVE STUDY
JOURNAL ARTICLE
MULTICENTER STUDY

Automatic time-lapse instrument is superior to single-point morphology observation for selecting viable embryos: retrospective study in oocyte donation

Belén Aparicio-Ruiz, Natalia Basile, Sonia Pérez Albalá, Fernando Bronet, José Remohí, Marcos Meseguer
Fertility and Sterility 2016, 106 (6): 1379-1385.e10
27530063

OBJECTIVE: To correlate the different categories provided by a commercial diagnostic test with blastocyst formation, quality, implantation potential, and ongoing pregnancy (OPR) for the purpose of validating the automatic annotations and the classification algorithm.

DESIGN: Observational, retrospective, multicenter cohort study.

SETTING: University-affiliated private IVF center.

PATIENT(S): A total of 3,002 embryos, including 521 transferred embryos with known implantation, from 626 IVF cycles that were incubated in a conventional incubator and monitored with an automatic time-lapse test.

INTERVENTIONS(S): None.

MAIN OUTCOME MEASURE(S): Embryo selection was based on morphology and the classification provided by a commercial diagnostic test. Implantation was the primary end point, and OPR, blastocyst formation (BR), and embryo morphology were secondary end points.

RESULT(S): BR and number of optimal blastocysts were related to the classification test. This correlation was also observed when analyzing implantation rates (day 3 transfer: high 38.2%, medium 31.7% and low 26.1%; day 5 transfer: high 66.7%, medium 50%, low 31%). Patients where no high embryos were transferred (n = 75) had an OPR of 46.70%, and those patients where at least one high embryo was transferred (n = 109) significantly increased OPR to 67%. A logistic regression analysis studying other confounding factors (day of transfer, number of oocytes obtained, and embryo morphology classification) was included. In that model, if at least one of the embryos was labeled as high, OPR was 2.567 times higher than a cycle where no high embryos were transferred.

CONCLUSION(S): Our study presents, to our knowledge, the largest set of transferred embryos after time-lapse analysis with the use of an automatic time-lapse test. The provided classification was related to reproductive outcome. Our results suggest that the automated embryo diagnostic test provided extra information to the embryologist to select the best embryos, independently from clinical features of the patient or day of transfer.

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