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Second-trimester levels of pregnancy-associated plasma protein-A and free β-hCG in pregnancies with trisomy 13 |
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| Authors: | K Spencer J A Crossley D A Aitken K H Nicolaides |
| Institution: | 1. Prenatal Screening Unit, Department of Clinical Biochemistry, Harold Wood Hospital, Essex, UK;2. Duncan Guthrie Institute of Medical Genetics, Yorkhill, Glasgow Scotland;3. Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, Denmark Hill, London, UK |
| Abstract: | |
| Keywords: | trisomy 18 trisomy 21 prenatal screening first trimester biochemical screening |