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Turning the pyramid of prenatal care.
Nicolaides KH.
Fetal Diagn Ther 2011;29:183-96. -
A reassessment of biochemical marker distributions in trisomy 21-affected and unaffected twin pregnancies in the first trimester.
Madsen HN, Ball S, Wright D, Tørring N, Petersen OB, Nicolaides KH, Spencer K.
Ultrasound Obstet Gynecol 2011;37:38-47. -
Screening for trisomy 21 in twin pregnancies in the first trimester: an update of the impact of chorionicity on maternal serum markers.
Spencer K, Kagan KO, Nicolaides KH.
Prenat Diagn 2008;28:49-52.