the most frequent types of skeletal dysplasia were achondroplasia , with a prevalence rate between 0.5 and 1.5/10 000 births , the thanatophoric dysplasia/achondrogenesis group ( 0.2 and 0.5/10 000 births ) , and osteogenesis imperfecta ( 0.4/10 000 births ) .
C0001080
achondroplasia
C0039743
thanatophoric