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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. -
Maternal circulating endothelial progenitor cells in normal singleton and twin pregnancy.
Savvidou MD, Xiao Q, Kaihura C, Anderson JM, Nicolaides KH.
Am J Obstet Gynecol 2008;198:414.1-5. -
Intrauterine growth in multiple pregnancies in relation to fetal number, chorionicity and gestational age.
Papageorghiou AT, Bakoulas V, Sebire NJ, Nicolaides KH.
Ultrasound Obstet Gynecol 2008;32:890-3.