· Cancer in three or more close family members
· Birth defects or congenital malformations
· Chromosome abnormalities
· Intellectual impairment
· Abnormal test results during pregnancy
· Paediatric developmental disorders
· Deafness
· Visual impairment
· Infertility
· Abnormal gene or DNA test results
· Cystic fibrosis, haemochromatosis, muscular dystrophy and many other health problems caused by single gene defects.
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