<unk>  is a condition most commonly affecting women, and is also called Female<unk>  (FAIS), although it can happen in both sexes. It is associated with lack of energy and motivation, depression, lack of desire (libido), and in more severe cases changes in secondary sex characteristics.
Androgen insufficiency syndrome
Aromatase excess syndrome
Gonadotropin-resistant ovary syndrome
Androgen deficiency
Primary ovarian insufficiency
Estrogen insensitivity syndrome
Progestin-induced virilization
Functional hypothalamic amenorrhea