Achondroplasia refers to a genetic disorder that results in dwarfism, also known as short stature. This genetic condition is the most common cause of dwarfism that affects around 1 in 15,000-40,000 individuals born. Dwarfism is a condition where a child is born with a normal size torso, shortened legs and arms, an enlarged head, and prominent forehead. Although a fully grown adult under 4 ft 10 inches tall can be considered to have dwarfism or short stature, dwarves have an average adult height of 4 ft 4 in for males and 4 ft for females. Their intelligence is generally normal. Dwarfism is a condition can be caused either by a genetic mutation or congenitally (inherited from parents) although the majority of cases occur with both parents being of normal height.