Achondroplasia is one of the oldest known birth defects. The frequency of achondroplasia is estimated to range from about 1 in 10,000 births in Latin America to about 12 in 77,000 in Denmark. An average figure worldwide is approximately 1 in 25,000 births.It results in abnormally short stature and is the most common cause of short stature with disproportionately short limbs.There is disorder of bone growth.