If one parent has achondroplasia
, a child has a 50 percent chance of inheriting the fgfr3 gene and subsequently developing achondroplasia.
If both parents have the disorder, the child has a three in four (75 percent) chance of developing achondroplasia. Also, in these cases, the child has a one in four chance of inheriting the gene from both parents. Newborns who inherit both genes are considered.