4Moore TR,Gale S,Benirschke K. Perinatal outcome of fortynine pregnancies complicated by acardiac twinning. Am J Obstet Gynecol, 1990,163:907-912.
5Healey MG. Acardia. predictive risk factors for the co-twin's survival. Teratology, 1994,50 . 205 -213.
6Arias F, Sunderji S, Gimpelson R, et al. Treatment of aeardiac twinning. Obstet Gyneeol,1998,91:818-821.
7Bianchi DW, Crombleholme TM, D' Alton ME. Fetology: diagnosis and management of the fetal patient. New York: Mcgraw-hill Medical Publishing Division,2000:885-890.
8Coulam CB, Wright G. First trimester diagnosis of acardiac twins. Early Pregnancy, 2000,4 : 261-270.
10van Allen MI, Smith DW, Shepard TH. Twin reversed arterial perfusion (TRAP) sequence..a study of 14 twin pregnancies with acardius. Semin Perinatol, 1983,7 . 285-293.
