Assessment of Placental Chromosomal Mosaicism during Prenatal Cell-Free DNA Screening Refines Positive Predictive Values for Fetal Trisomy
Clin Chem. 2025 Jul 28:hvaf076. doi: 10.1093/clinchem/hvaf076. Online ahead of print. ABSTRACT BACKGROUND: Confined placental mosaicism can cause false-positive prenatal cell-free DNA (cfDNA) screening results, thereby reducing the positive predictive value (PPV) of the test. We sought to investigate how PPVs for the common fetal trisomies can be refined based on the presence or absence … Read more
