Prolactin

Prolactin is a hormone produced mostly in the pituitary gland and is important for breastfeeding and milk production. It is also involved in the regulation of the body's metabolism, immune system, reproductive system, cardiovascular system and stress levels. Prolactin also plays a role in stimulating sex drive and fertility, regulating blood pressure, and is important for cell growth and differentiation. High levels of prolactin in the blood may lead to infertility, irregular menstrual cycles, and can also cause headaches, vision changes, and the production of milk from the breast in men. Low levels can be associated with decreased milk production in breastfeeding women. Prolactin is essential for the normal functioning of the body and is necessary for fertility, conception, and lactation.