Black Pearl. Near the top of the LBG list are natural black pearls, which represent some of the rarest and most exotic of gem materials. In the 1960s, however, a black pearl culturing industry was initiated, and today, cultured black pearls play a prominent role throughout the international jewelry community.
A prolactin test measures the level of the hormone prolactin, which is made by the pituitary gland , in your blood. Pregnant women have high levels of prolactin, which helps make breast milk. During pregnancy, prolactin levels increase by 10 to 20 times. After the baby is born, prolactin stays high if you are breast-feeding. In women who do not breast-feed, prolactin levels return to normal soon after they give birth.
In women, a prolactin test may be ordered if she displays symptoms of prolactinoma, which is a benign (non-cancerous)tumor on the pituitary glandthat produces high levels of prolactin. Symptoms of prolactinoma can include:1  unexplained headaches. 2  visual impairment.n other words, prolactin triggers lactation. The specific function of prolactin in men is not well known, although levels of prolactin have been found to be a measure of sexual satisfaction in both men and women. A prolactin test is a blood test that measures the level of the hormone in your body.