Hypopituitarism - "Deficiency of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), together referred to as the gonadotropins, leads to different symptoms in men and women. Women experience oligo- or amenorrhea (infrequent/light or absent menstrual periods respectively) and infertility. Men lose facial, scrotal and trunk hair, as well as suffering decreased muscle mass and anemia. Both sexes may experience a decrease in libido and loss of sexual function, and have an increased risk of osteoporosis (bone fragility). Lack of LH/FSH in children is associated with delayed puberty."
http://en.wikipedia.org/wiki/Hypopituitarism
Survive a bite from the Russel's Pit Viper - http://www.dailymail.co.uk/sciencetech/article-2091250/The-snake-bite-reverse-effects-puberty.html
