{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,27]],"date-time":"2026-06-27T02:54:57Z","timestamp":1782528897524,"version":"3.54.5"},"reference-count":29,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2003,11,3]],"date-time":"2003-11-03T00:00:00Z","timestamp":1067817600000},"content-version":"vor","delay-in-days":2,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Prenatal Diagnosis"],"published-print":{"date-parts":[[2003,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Prader\u2013Willi syndrome (PWS) results from either paternal deletion of 15q11\u2013q13, or maternal uniparental disomy (UPD) of chromosome 15 or imprinting center mutation. Prenatal diagnosis of PWS is currently indicated for chromosomal parental translocation involving chromosome 15 and for decreased fetal movements during the third trimester of gestation. Here we present the prenatal diagnosis of PWS during the first trimester of gestation and autopsy findings. Chorionic villus sampling (CVS) was performed for advanced maternal age at 13 weeks' gestation. CVS showed mosaicism including cells with a normal karyotype and cells with trisomy 15. Amniocentesis showed cells with a normal karyotype. Molecular analysis demonstrated that the fetus had a typical PWS abnormal methylation profile and maternal disomy for chromosome 15. Fetal ultrasound examination showed slightly enlarged lateral ventricles and hypoplasic male external genitalia without intra\u2010uterine growth retardation. The autopsy showed a eutrophic male fetus with facial dysmorphy, hypoplasic genitalia, abnormal position of both feet and posterior hypoplasia of the corpus callosum. This report points out that in a karyotypically normal fetus with ambiguous male external genitalia and cerebral anomalies, extensive cytogenetic and molecular biology studies are strongly recommended because of risk of PWS. Copyright \u00a9 2003 John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/pd.732","type":"journal-article","created":{"date-parts":[[2003,11,20]],"date-time":"2003-11-20T18:17:22Z","timestamp":1069352242000},"page":"938-943","source":"Crossref","is-referenced-by-count":26,"title":["Fetal phenotype of Prader\u2013Willi syndrome due to maternal disomy for chromosome 15"],"prefix":"10.1002","volume":"23","author":[{"given":"A. 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