7Yaron Y, Cherry M,Kramer RL,et al. Second-trimester maternal serum marker screening: maternal serum alpha-fetoprotein,beta-human chorionic gonadotropin, estriol,and their various combinations as predictors of pregnancy outcome[J]. Am J Obstet Gynecol,1999, 181 (4):968-974.
8Ray JG,Laskin CA.Folic acid and Homocysteine metabolic defeets and the risk of placental abruption,pre-eclampsia and spontaneous pregnancy loss: a systematic review[J].Placenta,1999,20(7):519-529.
9Nakatsuka M, Asagiri K, Kimura Y, et al.Generation of peroxynitrite and apoptosis in placenta of patients with chorioamnionitis: possible implications in placental abruption[J]. Hum Reprod,1999,14(4): 1101-1106.
10Eskes TK.Homocysteine and human reproduction[J].Clin Exp Obstet Gynecol,2000,27(3/4): 157-167.
