brain tumor symptoms6

Sexual Impotence. The pituitary gland is a tiny gland about the size of a pea and sited just under the brain. This gland is a master-gland that controls the release of hormones from other glands, such as the secretion of hormones responsible for conception and childbirth. When a tumor affects the pituitary gland, this can result in an over or under production of hormones, both of which can completely disrupt the processes of conception, birth, and even lactation.