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Screening for trisomy at 11-13 weeks' gestation: use of pregnancy-associated plasma protein-A, placental growth factor or both.
Mazer Zumaeta A, Wright A, Syngelaki A, Maritsa VA, Bardani E, Nicolaides KH.
Ultrasound Obstet Gynecol 2020;56:408-415. pdf -
First-trimester screening for trisomies in pregnancies with vanishing twin.
Chaveeva P, Wright A, Syngelaki A, Konstantinidou L, Wright D, Nicolaides KH.
Ultrasound Obstet Gynecol 2020;55:326-331. pdf -
First-trimester markers of aneuploidy in women positive for HIV.
Savvidou M, Samuel I, Syngelaki A, Poulton M, Nicolaides K.
BJOG 2011;118:844-8. -
Maternal serum free beta-hCG at 10 to 14 weeks of gestation in trisomic twin pregnancies.
Noble PL, Snijders RJ, Abraha HD, Sherwood RA, Nicolaides KH.
BJOG 1997;104:741-3.