The hormone released from the pituitary gland that stimulates the production of testosterone in males and the production of progesterone in females. This hormone uses cyclic AMP as its second messenger.
Kidney Stones
Most urinary tract stones originate as crystals in the kidney, grow within the kidney, and then migrate or pass through the urinary tract. Stones can also start and/or grow within the bladder. Bladder stones are often associated with chronic urinary blockage or infection, or severe protein starvation sometimes seen in the third world. Prostate stones grow within the prostate, probably as a result of infection. Prostate stones do not migrate or pass.
Kidney stones are formed from varied molecules. They are usually crystals of one or another molecule, but may be formed of combinations of elements or rarely protein matrix. Calcium oxalate is the most common type of stone. These stones are usually easy to see on x-ray and cannot be dissolved.

This definition is in context to Hormone Replacement Therapy. See more contextual defintions for Luteinizing Hormone (LH).