摘要: Couples who embark on a pregnancy expect to have ‘normal’ child, yet 2% will an abnormal outcome. Until 20 years ago there was no choice but accept the risks distributed by nature. If fate gave you defective child accepted it as well could and then learned live with consequent perpetual grief. Parents were aware of genetic problem within their family may avoided having any children because fear outweighed desire for offspring. They subsequently suffered sadness not realizing desired family.