J Assist Reprod Genet. 2025 Jan 9. doi: 10.1007/s10815-024-03385-2. Online ahead of print.
ABSTRACT
PURPOSE: To evaluate if morphology and morphokinetics of cleaved embryos affect prenatal and perinatal outcomes.
METHODS: This retrospective cohort study included 734 single fresh embryo transfer (SET) from ICSI from January 2014 to December 2020 at the Dijon University Hospital. Using time-lapse technology, embryos were defined as TOP or non-TOP according to morphological/morphokinetic criteria. Linear regression, adjusted for maternal factors, explored the association between cleaved-embryo quality and implantation rate, miscarriage rate, live birth rate, term, birthweight, and birthweight Z-score.
RESULTS: Multivariate analyses showed that non-implanted embryos were significantly more often out of the interquartile range than implanted embryos for cell events t2 (p = 0.019), t3 (p = 0.038), t4 (p = 0.013), ECC1 (p = 0.047), and ECC2 (p = 0.001). After implantation, the morphokinetics was significantly different for non-TOP embryos ending in miscarriage or live birth. A significant high risk of miscarriage was found for embryos with a short or long ECC1 (3.27 [95% CI: 1.44;8.37]. There was no significant difference in birthweight, birthweight Z-score, or term between TOP and non-TOP embryos. An association with increased birthweight was observed in multivariate analysis for pronuclei appearance (tPNa) (p = 0.001out of the range. Late tPNa was associated with a higher birthweight Z-score (p < 0.0001) while late pronuclei disappearance (tPNf) was associated with a lower Z-score (p = 0.006).
CONCLUSION: Morphological and morphokinetic parameters significantly influence implantation rates and the likelihood of a live birth from embryos with non-optimal morphological features. Birthweight Z-scores were significantly higher with late tPNa and lower with late tPNf.
PMID:39786529 | DOI:10.1007/s10815-024-03385-2
