title: Maternal age influence and zygotic origin in Klinefelter and mongol mosaicism.
mesh_terms: D000328:Adult; D004314:Down Syndrome; D005260:Female; D006801:Humans; D007713:Klinefelter Syndrome; D008423:Maternal Age; D009030:Mosaicism; D012729:Sex Chromosome Aberrations; D014314:Trisomy