A recent study published in Nature Biotechnology utilised live imaging to examine late-stage preimplantation human embryos, sparking a renewed debate on the efficacy of embryo testing (PGT-A). Experts suggest that the study’s findings could help inform IVF clinics. The research contributes to the understanding of chromosomal abnormalities in embryos, and the impact of these abnormalities on the success of IVF treatments. The study has also raised questions about the timing of embryo transfer, a crucial aspect of IVF procedures. Despite the groundbreaking nature of the research, some experts caution that further studies are needed to fully comprehend the clinical implications of the findings.