Prenatal Screening of Chromosomal Anomalies Using Genome-Wide or Target Cell-Free DNA: Preferences and Satisfaction of Pregnant Women.

Background/Objectives : Cell-free DNA (cfDNA) is a non-invasive prenatal test used to screen for common trisomies (target cfDNA) that can be expanded to assess all autosomal chromosomes (genome-wide cfDNA). As cfDNA testing gains popularity, it is crucial to examine the factors influencing the decision-making process of pregnant individuals when choosing between these two approaches. Methods : In this prospective cohort study, 190 individuals undergoing cfDNA testing for aneuploidy screening, according to the current screening protocol, were allowed to make their own choice between target and genome-wide cfDNA testing. They were asked to complete a first survey at 11-13 weeks, designed to explore their characteristics, preferences, and satisfaction with the prenatal genetic counseling session, as well as a Decisional Conflict Scale. A postnatal survey was administered three months after delivery, including the Decisional Regret Scale and two open questions. Results : 84% of participants opted for genome-wide cfDNA. However, 17% found the decision challenging, and 14% felt that the results might increase anxiety. No significant differences in participant characteristics were found when comparing decisions between genome-wide and target cfDNA. However, significant differences were observed regarding ethnicity ( p = <0.001), educational level ( p = 0.029), previous cfDNA experience ( p = 0.004), and having sufficient information when comparing termination options ( p = 0.002). After delivery, only 4% would have changed their decision. Conclusions : Individuals, regardless of their characteristics, prefer genome-wide cfDNA; however, the complexity of the results necessitates enhanced genetic education for prenatal care clinicians.