Second trimester serum tests for Down's Syndrome screening
(2012)
Journal Article
Alldred, S. K., Deeks, J. J., Guo, B., Neilson, J. P., & Alfirevic, Z. (2012). Second trimester serum tests for Down's Syndrome screening. Cochrane Database of Systematic Reviews, https://doi.org/10.1002/14651858.CD009925
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 retardation. Noninvas...
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