TY - CHAP M1 - Book, Section TI - 47, XXX (Triple X Syndrome, Trisomy X) A1 - Bianchi, Diana W. A1 - Crombleholme, Timothy M. A1 - D'Alton, Mary E. A1 - Malone, Fergal D. PY - 2015 T2 - Fetology: Diagnosis and Management of the Fetal Patient, 2e AB - Key PointsIncidence is 1 in 1000 females.Most cases are undiagnosed.Associated with advanced maternal age (70% are due to a meiosis I error).There are no characteristic fetal sonographic findings in this condition, except for occasional genitourinary anomalies.IQ of affected women is in the normal range, but 10 to 15 points lower than siblings.Mild learning disabilities are primarily verbal.Adult women with 47, XXX are tall and fertile. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/10/10 UR - obgyn.mhmedical.com/content.aspx?aid=1106402182 ER -