The study of heterogeneity and natural history--the importance of this type of research with chondrodystrophies as an example.
D000328:Adult; D005260:Female; D005817:Genetic Counseling; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010009:Osteochondrodysplasias / Q000175:diagnosis / Q000235:genetics* / Q000503:physiopathology; D011247:Pregnancy; D011296:Prenatal Diagnosis