Myasthenia Gravis is an autoimmune disease that affects the neuromuscular structure of the body. The body’s immune system attacks the nerve signals in the muscles as if they were foreign matter. Myasthenia Gravis is a progressive, degenerative disease that can lead to death if untreated. This disease affects both men and women but at different ages, however it is more common in women and is therefore thought to be linked to hormones. The onset begins for men when in their 60’s while women tend to develop it in their 20’s or 30’s. With Myasthenia Gravis, the body’s immune system’s antibodies interfere with the nerve signals to the muscles, making contracting voluntary muscles difficult. The exact cause of Myasthenia Gravis is not known but many contributing factors have been linked to it such as thyroid conditions, stress, certain medications, pregnancy, menstrual cycles, and viral or respiratory illnesses.