Twin pregnancy and the risk of preeclampsia: bigger placenta or relative ischemia?
Bdolah Y, Lam C, Rajakumar A, Shivalingappa V, Mutter W, Sachs BP, Lim KH, Bdolah-Abram T, Epstein FH, Karumanchi SA. Twin pregnancy and the risk of preeclampsia: bigger placenta or relative ischemia? Am J Obstet Gynecol. 2008 Apr; 198(4):428.e1-6.