An investigation into the effect of potential confounding patient and treatment parameters on human embryo morphokinetics

Embryo morphokinetics are subtly affected by patient and treatment parameters exhibiting complex relationships rather than a systemic effect, as analyzed using multiple regression on 2,376 embryos from 639 patients.

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VOLUME 115, ISSUE 4, P1014-1022

Authors:

Amy Barrie, Ph.D., Garry McDowell, Ph.D., Stephen Troup, Ph.D.

Abstract:

Objective

To determine the effect of patient and treatment parameters on 19 embryo morphokinetic parameters using pronuclear fading as time zero.


Design

Single-site, retrospective cohort analysis.


Setting

Fertility treatment center.


Patients(s)

Patients undergoing treatment between September 2014 and January 2016 (n = 639) whose embryos were cultured in the EmbryoScope for 6 days (n = 2,376).


Intervention(s)

None.


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. Beta coefficients were analyzed to quantify any significant effects.


Result(s)

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(s)

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 depending on the embryo’s origin.

Fertility and Sterility

Editorial Office, American Society for Reproductive Medicine

Fertility and Sterility® is an international journal for obstetricians, gynecologists, reproductive endocrinologists, urologists, basic scientists and others who treat and investigate problems of infertility and human reproductive disorders. The journal publishes juried original scientific articles in clinical and laboratory research relevant to reproductive endocrinology, urology, andrology, physiology, immunology, genetics, contraception, and menopause. Fertility and Sterility® encourages and supports meaningful basic and clinical research, and facilitates and promotes excellence in professional education, in the field of reproductive medicine.