Familial occurrence of congenital malformations and ring chromosome (46,XX,Cr).
D000015:Abnormalities, Multiple / Q000235:genetics*; D000022:Abortion, Spontaneous / Q000235:genetics; D001345:Autoradiography; D002675:Child, Preschool; D002869:Chromosome Aberrations; D002906:Chromosomes, Human, 6-12 and X; D004200:Diseases in Twins / Q000235:genetics; D005260:Female; D006801:Humans; D007621:Karyotyping; D007962:Leukocytes / Q000166:cytology; D009061:Mouth Mucosa / Q000166:cytology; D010375:Pedigree; D011247:Pregnancy