Hirsutism or central. It can be caused by increased levels of androgen hormones. The amount and location of the hair is measured by a Ferriman-Gallwey score. It is different than hypertrichosis, which is excessive hair growth anywhere on the body. Treatments may include birth control pills that contain estrogen and progestin, antiandrogens, or insulin sensitizers. Hirsutism affects between 5–15% of all women across all ethnic backgrounds. Depending on the definition and the underlying data, estimates indicate that approximately 40% of women have some degree of unwanted facial hair. Hirsutism affects members of either sex, since rising androgen levels can cause excessive
Neoteny in humans neotenic changes may have disparate roots. Some may have been brought about by sexual selection in human evolution. In turn, they may have permitted the development of human capacities such as emotional communication. However, humans also have relatively large noses and long legs, both peramorphic (not neotenic) traits, though said peramorphic traits that separate modern humans from extant chimpanzees were present in Homo erectus to an even higher degree than in Homo sapiens, keeping general neoteny valid for the erectus to sapiens transition although there were perimorphic changes separating erectus from even earlier hominins such as Australopithecus. Many prominent evolutionary