ISPD 2021 Debate - All in Vitro Fertilization Cycles Should Involve Pre-implantation Genetic Testing to Improve Fetal Health and Pregnancy Outcomes
Overview
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For 3 decades, couples at increased risk for a genetic disorder have been offered preimplantation genetic testing (PGT). Simultaneously, PGT for aneuploidy (PGT-A) to improve in vitro fertilization (IVF) outcomes was introduced, but evidence of value-added remains inconsistent. Recently, lower genetic testing costs and shorter turnaround time have reinvigorated PGT-A. Additionally, a shift from blastomere (day 3) to blastocyst (day 5) transfer and embryo freezing advances support PGT without the time constraints of immediate transfer. PGT-A transformed from a time-constrained analysis of 1-2 cells to an "add on" study for all IVF. But should it be offered to all IVF patients? And if not, under what conditions? Pre-debate polling found 64% opposed to PGT for all IVF cycles with concerns voiced about cost, informed consent, and a "slippery slope". Leaving aside the inconsistent evidence of IVF improvement whether measured as miscarriage or livebirths with PGT-A, the debaters grappled with patient and provider desires versus the ethical concerns for the unborn child. However, the audience was not swayed; two thirds remained opposed to PGT for all IVF cycles.
Preimplantation genetic testing for aneuploidy: challenges in clinical practice.
Yang H, DeWan A, Desai M, Vermund S Hum Genomics. 2022; 16(1):69.
PMID: 36536471 PMC: 9764701. DOI: 10.1186/s40246-022-00442-8.
Polygenic risk score for embryo selection-not ready for prime time.
Polyakov A, Amor D, Savulescu J, Gyngell C, Georgiou E, Ross V Hum Reprod. 2022; 37(10):2229-2236.
PMID: 35852518 PMC: 9527452. DOI: 10.1093/humrep/deac159.