A genetic disorder, also known as trilogy 18 syndrome, that is associated with the presence of a third copy of chromosome 18. Edward syndrome affects about three times as many girls as boys.
The characteristics of the syndrome include severe learning difficulties, a low birth weight, low set and malformed ears, hand abnormalities, a small jaw, congenital heart disease, opacities in the cornea, hernias and kidney abnormalities.
Roughly half the babies born with the syndrome do not survive beyond the first week of life. A very few number of infants live longer than a year. Those with a family history of the syndrome should consider genetic counselling before attempting to start a family.