section_path: Biological and physiological aspects/Physical anatomy and reproduction/Brain
section_name: Brain
paragraph_text: Brain
  
  The hypothalamus is the most important part of the brain for sexual functioning. This is a small area at the base of the brain consisting of several groups of nerve cell bodies that receives input from the limbic system. Studies have shown that within lab animals, the destruction of certain areas of the hypothalamus causes the elimination of sexual behavior. The hypothalamus is important because of its relationship to the pituitary gland, which lies beneath it. The pituitary gland secretes hormones that are produced in the hypothalamus and itself. The four important sexual hormones are oxytocin, prolactin, follicle-stimulating hormone, and luteinizing hormone.
  
  Oxytocin, sometimes referred to as the "love hormone", is released in both sexes during sexual intercourse when an orgasm is achieved. Oxytocin has been suggested as critical to the thoughts and behaviors required to maintain close relationships. The hormone is also released in women when they give birth or are breastfeeding. Prolactin and oxytocin are responsible for inducing milk production in women. Follicle-stimulating hormone (FSH) is responsible for ovulation in women, and acts by triggering egg maturity; in men it stimulates sperm production. Luteinizing hormone (LH) triggers ovulation, which is the release of a mature egg.