The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust. When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing . Prolactin-secreting tumors can arise in both males and females. Prolactin is a protein hormone secreted from the anterior pituitary gland.
Prolactin stimulates the production of milk in females.
There is no known normal function of prolactin in males. Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.