What ratio is dwarfism?

Dwarfism is typically defined as a condition resulting in short stature, and it is most commonly characterized by an adult height of 4 feet 10 inches (147 centimeters) or shorter. The ratio of individuals with dwarfism can vary, but it is estimated that it occurs in about 1 in 1,000 to 1 in 2,500 births, depending on the specific type of dwarfism. The most common form is achondroplasia, which accounts for approximately 70% of dwarfism cases.