The pituitary gland is a small, pea-sized endocrine gland located at the base of the brain that plays a pivotal role in regulating critical body functions and general wellbeing. This gland is considered the "master control gland" because it governs the activity of most other hormone-secreting glands in the endocrine system. The pituitary has two lobes with distinct functions:
- The anterior lobe produces and secretes hormones that regulate key physiological processes including:
- Growth hormone - stimulates growth of bones and tissues
- Thyroid-stimulating hormone - triggers thyroid gland hormone production
- Adrenocorticotropic hormone - stimulates hormone production by adrenal cortex
- Prolactin - stimulates breast milk production
- Follicle-stimulating hormone and luteinizing hormone - regulate ovulation and testosterone production
- The posterior lobe stores and releases two hormones manufactured by the hypothalamus:
- Oxytocin - stimulates uterine contractions during childbirth and milk release during breastfeeding
- Antidiuretic hormone - regulates fluid balance and blood pressure
- Pituitary tumors - abnormal growths that affect hormone production
- Pituitary apoplexy - bleeding or impaired blood flow to pituitary
- Pituitary adenomas - noncancerous tumors that can compress surrounding tissues
- Hypopituitarism - underactive pituitary function
- Acromegaly - excessive growth hormone, causing abnormal growth of hands, feet, facial bones