https://homosaurus.org/v4/homoit0002848 homoit0002848 Isolated 17,20-lyase deficiency ILD 2023-06-28 xsd:date 2023-06-28 xsd:date https://homosaurus.org/v4/homoit0000669 Intersex variations People with isolated 17,20-lyase deficiency (ILD) have one of several specific variations in their genes that cause their bodies to make lower-than-typical amounts of testosterone. They may be born with genitals that do not appear quite like a typical penis, and their testes may be descended or undescended. In adolescence, they may not experience all of the changes related to a typical testosterone puberty because their variation impacts their hormone production.