OHSU

pituitary-anatomyAbout the Pituitary

The pituitary gland is a small organ about the size of a pea in the center of your head. The pituitary makes hormones (chemicals that control different systems in your body). Pituitary hormones are important for maintaining normal body function.

The hormones your pituitary gland makes are:

  • ACTH (adrenocorticotropic hormone)
  • TSH (thyroid stimulating hormone)
  • LH (luteinizing hormone)
  • FSH (follicle stimulating hormone)
  • GH (growth hormone)
  • Prolactin

Part of the pituitary gland connects to the bottom of your brain (hypothalamus). This part of the brain makes two hormones that the pituitary gland stores until they are needed:

  • ADH (antidiuretic hormone)
  • Oxytocin

When you need these hormones, the pituitary gland sends them to the rest of your body.