Low levels of these hormones indicate hypothalamic and pituitary disorders . Estradiol To identify causes of infertility , menstrual irregularity , or precocious puberty . Elevated levels indicate possible disorders. Oral contraceptives lower estradiol levels. Prolactin To diagnose galactorrhea , amenorrhoea , or infertility .
High levels occur normally during pregnancy, breastfeeding, and after a hysterectomy.
Otherwise, high levels indicate a prolactin-secreting tumour. Many drugs, including oestrogens and antihypertensives, can cause elevated levels. Abnormally high levels in women may indicate a malfunction of the ovaries. To determine cause of hirsutism, amenorrhoea., or infertility. Abnormally high levels may indicate an adrenal gland disorder.