Article
First and second trimester serum tests with and without first trimester ultrasound tests for Down's syndrome screening
15 Mar 2017
Abstract excerpt
BACKGROUND: Down's syndrome occurs when a person has three copies of chromosome 21 (or the specific area of chromosome 21 implicated in causing Down's syndrome) rather than two. It is the commonest congenital cause of mental disability. Non-invasive screening based on biochemical analysis of maternal serum or urine, or fetal ultrasound measurements, allows estimates of the risk of a pregnancy being affected and...
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