An investigation into the effect of potential confounding patient and treatment parameters on an embryo’s morphokinetic profile
Objective: To determine the effect of patient and treatment parameters on nineteen embryo morphokinetic parameters using pronuclear fading as time-zero.
Patients: Patients undergoing treatment between September 2014 and January 2016 (n=639) whose embryos were cultured in the EmbryoScope® for six days (n=2376).
Main Outcome Measure(s): Multiple regression analysis of body mass index, maternal age, infertility diagnosis, treatment type, suppression protocol on time to each cellular division (tn); t2, t3, t4, t5, t6, t7, t8, t9, time to start of compaction (tM), start of blastulation (tSB), full blastocyst (tB) and interval measurements; s2, s3, cc2, cc3, cc4, t9-tM, tM-tSB and tSB-tB. Multiple regression results were considered significant at p<0.05 and beta coefficients were analysed to quantify any significant effects.
Results: Embryos appeared to be subtly affected by patient and treatment parameters, exhibiting complex relationships between various morphokinetic parameters and specific patient and treatment factors, rather than a systemic effect.
Conclusion: These findings outline the need for the consideration of confounding factors when assessing an embryo’s ability to achieve implantation. Although morphokinetic parameters have been related to embryo viability, it is likely that this will vary dependent on the embryo’s origin.