CYTOGENETICS OF DOWN'S SYNDROME (MONGOLISM). II. THE FREQUENCY OF INTERCHANGE TRISOMY IN PATIENTS BORN AT A MATERNAL AGE OF LESS THAN 30 YEARS.
D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D020732:Cytogenetic Analysis; D003582:Cytogenetics; D004314:Down Syndrome; D005826:Genetics, Medical; D006801:Humans; D008423:Maternal Age; D014314:Trisomy
CHROMOSOME ABNORMALITIES; GENETICS, HUMAN; MATERNAL AGE; MONGOLISM; TRISOMY