Chromosomal survey in 298 normal subjects and 1,253 cases of congenital disorders during 1966-1970.

Abnormalities, Multiple/genetics Adolescent Adult Aged Aneuploidy Blood Cells/cytology Bone Marrow Cells Child Child, Preschool Chromosome Aberrations/classification Chromosome Disorders Chromosomes, Human, 13-15 Chromosomes, Human, 16-18 Chromosomes, Human, 21-22 and Y Disorders of Sex Development/epidemiology Down Syndrome/epidemiology Endocrine Glands/abnormalities Eye Abnormalities Female Heart Defects, Congenital/genetics Hepatitis/congenital Humans Infant Infant, Newborn Italy Karyotyping Kidney/abnormalities Male Mass Screening Middle Aged Mosaicism Mouth Mucosa/cytology Musculoskeletal Abnormalities Nervous System Malformations Polymorphism, Genetic Sex Chromosome Aberrations/epidemiology Skin Abnormalities Skull/abnormalities Trisomy