-
Fetal fraction of cell-free DNA in maternal plasma in the prediction of spontaneous preterm delivery.
Quezada MS, Francisco C, Dumitrascu-Biris D, Nicolaides KH, Poon LC.
Ultrasound Obstet Gynecol 2015;45:101-5. pdf -
Maternal plasma cell-free fetal and maternal DNA at 11-13 weeks' gestation: relation to fetal and maternal characteristics and pregnancy outcomes.
Poon LC, Musci T, Song K, Syngelaki A, Nicolaides KH.
Fetal Diagn Ther 2013;33:215-23. pdf -
Maternal serum ferritin at 11- to 13-week gestation in spontaneous early preterm delivery.
Beta J, Poon LC, Bakalis S, Mosimann B, Nicolaides KH.
J Matern Fetal Neonatal Med 2012;25:1852-5.