Erzincan, S. G.Saying, N. C.Inan, C.Yuce, M. A.Varol, F. G.Basaran, S.2024-06-122024-06-1220180390-6663https://doi.org/10.12891/ceog4051.2018https://hdl.handle.net/20.500.14551/21012In this article, the authors reported the findings of a false negative case of cell-free DNA (cfDNA) testing for trisomy 21. The cfDNA test was performed due to the increased nuchal translucency during the first trimester scan. After receiving the normal result of the test, the patient was followed up. However, intrauterine growth retardation and ventriculomegaly were detected in the second trimester of pregnancy and fetal karyotyping revealed trisomy 21.en10.12891/ceog4051.2018info:eu-repo/semantics/openAccessFalse Negative Cell-Free DNA TestingFetal AneuploidyPrenatal DiagnosisTrisomy 21Article456939941Q4WOS:0004718557000302-s2.0-85058842097Q4