Clinical Feasibility of Early First-Trimester Non-Invasive Prenatal Testing: Associations Between Gestational Age, Fetal Fraction, and No-Call Rates
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Background: Non-invasive prenatal testing (NIPT) based on cell-free fetal DNA (cffDNA) is widely used for screening common fetal aneuploidies. Although fetal fraction (FF) increases with gestational age, the feasibility and perfo... ...
