Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Dwarfism ?
    ### Response:
    A dwarf is a person of short stature - under 4' 10" as an adult. More than 200 different conditions can cause dwarfism. A single type, called achondroplasia, causes about 70 percent of all dwarfism. Achondroplasia is a genetic condition that affects about 1 in 15,000 to 1 in 40,000 people.
    