what can cause amenorrhea
Amenorrhea can result because of an abnormality in the hypothalamic-pituitary-ovarian axis, anatomical abnormalities of the genital tract, or functional causes. Hypothalamic causes. 1  Craniopharyngioma (a brain tumor near the pituitary gland)  Teratoma (a tumor made up of a mixture of tissues)
Secondary amenorrhea can occur due to natural changes in the body. For example, the most common cause of secondary amenorrhea is pregnancy. Breastfeeding and menopause are also common, but natural, causes. Women who take birth control pills or who receive hormone shots such as Depo-Provera may not have any monthly bleeding.