| Labor Labor usually starts two weeks before or after the estimated date of delivery. No one knows exactly what triggers the onset of labor. |
| Labor and Delivery Detailed information on labor and delivery |
| Lactose Intolerance Detailed information on lactose intolerance, including causes, symptoms, diagnosis, and treatment |
| Landau-Kleffner Syndrome Detailed information on Landau-Kleffner syndrome, including signs, diagnosis, and treatment |
| Language Disorders Detailed information on the most common types of language disorders, including aphasia and Landau-Kleffner syndrome |
| Laryngeal Cancer (Cancer of the Larynx) Detailed information on laryngeal cancer (cancer of the larynx), including symptoms, cause, risk factors, diagnosis, and treatment |
| Laser Surgery for Lesions and Skin Conditions Detailed information on laser surgery for skin conditions |
| Laser Surgery Overview Detailed information on laser surgery and what types of surgeries may be performed with lasers |
| Lateral Epicondylitis (Tennis Elbow) The pain of tennis elbow is caused by damage to the tendons that bend the wrist backward away from the palm. |
| Latex Allergy Symptoms of latex allergy include watery or itchy eyes, wheezing, hives, flushing or a skin rash, itching, or swelling. |