title: Difficulty in showing mosaicism in the mother of three mongols.
mesh_terms: D004314:Down Syndrome / Q000175:diagnosis / Q000235:genetics*; D005260:Female; D005817:Genetic Counseling; D006801:Humans; D007621:Karyotyping; D007962:Leukocytes / Q000166:cytology; D008297:Male; D009030:Mosaicism; D010375:Pedigree