See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/221823361 First trimester maternal serum free human chorionic gonadotropin and pregnancy- associated plasma protein A in... Article in BJOG An International Journal of Obstetrics & Gynaecology · March 2012 DOI: 10.1111/j.1471-0528.2011.03253.x · Source: PubMed CITATIONS 13 READS 45 5 authors, including: Makrina D Savvidou Chelsea and Westminster Hospital NHS Foun… 38 PUBLICATIONS 1,321 CITATIONS SEE PROFILE Argyro Syngelaki King's College Hospital NHS Foundation Trust 114 PUBLICATIONS 2,706 CITATIONS SEE PROFILE Mazen Muhaisen 3 PUBLICATIONS 27 CITATIONS SEE PROFILE All content following this page was uploaded by Argyro Syngelaki on 04 April 2015. The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately.