|Tests conducted during pregnancy do not pick up all genetic defects in the foetus, Italian research shows.
The study, conducted on over 100,000 prenatal diagnoses which used invasive tests such as amniocentesis, found that the tests identified only half of chromosomal abnormalities.
Speaking at the annual conference of the European Society of Human Genetics, Dr Francesca Grati, of the TOMA Laboratory in Italy, said: "Our research confirms that it is fundamental for doctors to counsel patients about the limitations of current screening methods, so that they can make an informed decision on whether or not to undergo invasive diagnostic testing."
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