Achondrogenesis is the most severe form of congenital chondrodysplasia (malformation of bones and cartilage). It is lethal, resulting in stillbirth or death a few days after the birth. A congenital disorder is a medical condition or defect that is present at or before birth (for example, congenital heart disease). ... Grays illustration of a human femur, a typically recognized bone. ... Cartilage is a type of dense connective tissue. ... Stillbirth is when pregnancy ends without a live birth due to natural causes, including pregnancy loss, miscarriage, or spontaneous abortion. ... Death is the cessation of physical life in a living organism, or the state of the organism after that event. ...