Artificial organ almost always preceded by extensive experiments with animals. Initial testing in humans is frequently limited to those either already facing death or who have exhausted every other treatment possibility. Artificial arms and legs, or prosthetics, are intended to restore a degree of normal function to amputees. Mechanical devices that allow amputees to walk again or continue to use two hands have probably been in use since ancient times, the most notable one being the simple peg leg. Since then, the development of artificial limbs has progressed rapidly. New plastics and other materials, such as carbon fiber have allowed artificial limbs
Human Fertilisation and Embryology Authority 10% over a period of years. Former Chairs include Professor Lisa Jardine, Walter Merricks, Shirley Harrison, Lord Richard Harries, Dame Suzi Leather, Baroness Ruth Deech and Colin Campbell. Other notable former members include Professor Emily Jackson. Human Fertilisation and Embryology Authority The Human Fertilisation and Embryology Authority (HFEA) is an executive non-departmental public body of the Department of Health in the United Kingdom. It is a statutory body that regulates and inspects all clinics in the United Kingdom providing "in vitro" fertilisation (IVF), artificial insemination and the storage of human eggs, sperm or embryos. It also regulates human embryo research.