TY - CHAP M1 - Book, Section TI - 47, XYY 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 males.Most cases are undiagnosed.Not associated with advanced parental age.There are no characteristic fetal sonographic findings.IQ of affected males is in the normal range, but 10-15 points lower than siblings.Mild learning disabilities involve verbal but not mathematical skills.Adult males are tall, thin, and fertile.Pregnant partners of adult males with 47, XYY should be offered testing for the fetal karyotype due to the increased incidence of sex chromosome abnormalities in sperm. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/29 UR - obgyn.mhmedical.com/content.aspx?aid=1106402216 ER -