RCT Study to Validate niPGT-A Clinical Benefit.

"Two scenarios should be considered according to the results in the SBM analysis:~1. The couple decides to transfer the blastocyst selected according to the SBM result (blastocyst prioritization system).~2. The couple decides to biopsy the blastocysts (if SBM results show low euploidy score). This PGT-A analysis will be offered for free but the outcome of these transfers will be excluded for the analysis per completed protocol. However, all transfers will be included in the intention-to-treat analysis.~In the exceptional case of getting a non-informative result for all the SBM analysed, the niPGT-A could be performed again on new SBM samples collected after an additional culture of the embryos for, at least, 8 hours."

Embryos for transfer will be selected by the only applicable technique, the assessment of morphology according to Gardner´s criteria, which is the most standardized method.