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Placental volume in twin and triplet pregnancies measured by three-dimensional ultrasound at 11 + 0 to 13 + 6 weeks of gestation.
Wegrzyn P, Fabio C, Peralta A, Faro C, Borenstein M, Nicolaides KH.
Ultrasound Obstet Gynecol 2006;27:647-51. -
Maternal cardiac function in twin pregnancy.
Kametas NA, McAuliffe F, Krampl E, Chambers J, Nicolaides KH.
Obstet Gynecol 2003;102:806-15. -
Assessment of endothelial function in normal twin pregnancy.
Savvidou MD, Donald AE, Nicolaides KH.
Ultrasound Obstet Gynecol 2001;17:220-3.