Follicle-stimulating hormone, increased
More common causes
Pituitary infarction
Less common causes
Premature ovarian failure
Pituitary apoplexy
Hypogonadotrophic hypogonadism
Anovulatory cycles
Kallmann syndrome
Craniopharyngiomas
Uncommon causes
Combined pituitary hormone deficiency 5 (HESX1 gene)
Pharmacological causes
Naltrexone ER
Naltrexone hydrochloride