The adrenal glands are small glands attached to the top of each kidney. The human body has two adrenal glands that release chemical messengers called hormones into the bloodstream. These hormones travel via the blood to have an action in other parts of the human body.
The ovaries produce and release eggs (oocytes) into the female reproductive tract at the mid-point of each menstrual cycle. They also produce the female hormones oestrogen and progesterone and androgens.
The pituitary gland is a small pea-sized gland that plays a major role in regulating vital body functions and general wellbeing. It is referred to as the body's 'master gland' because it controls the activity of most other hormone-secreting glands.