title: Letter: Neonatal deaths and sex-chromosome anomalies.
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics / Q000401:mortality; D003645:Death, Sudden; D005260:Female; D005313:Fetal Death / Q000209:etiology*; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000401:mortality*; D007621:Karyotyping; D008297:Male; D011247:Pregnancy; D012729:Sex Chromosome Aberrations / Q000150:complications / Q000235:genetics / Q000401:mortality