TY - JOUR T1 - Vanished Twins and Misdiagnosed Sex: A Case Report with Implications in Prenatal Counseling Using Noninvasive Cell-Free DNA Screening JF - The Journal of the American Board of Family Medicine JO - J Am Board Fam Med SP - 411 LP - 413 DO - 10.3122/jabfm.2016.03.150196 VL - 29 IS - 3 AU - James F. Kelley AU - George Henning AU - Anthony Ambrose AU - Alan Adelman Y1 - 2016/05/01 UR - http://www.jabfm.org/content/29/3/411.abstract N2 - Cell-free DNA testing is a recently introduced method for screening pregnant women for fetal trisomy, which is associated with some common significant genetic diseases, as well as the sex of the fetus. The case described here demonstrates the connection between the ultrasound “vanishing twin” phenomenon and the misdiagnosis of prenatal sex using cell-free DNA testing. ER -