4Arck PC, hecher K. Fetomatemal immune cross-talk and its con- scquences for maternal and offspring:s health. Nat Med, 2013, 19 (5): 548 -556.
5Vrachnis N, Kalampoks E, Sifakis S, et al. placental growth factor (PLGF): a key to optimizing fatal growth. J Matern Fe- tal NeonatalMed, 20130 26 (10): 995-1002.
6Ji L, B rkic J, Liu M, et al. Placental trophoblast cell differ- entiation: physiological regulation and pathologicalrelevance to preeclampsia. MolAspectsMed, 2013, 34 (5): 981-1023.
7Schwarze A, Nelles I, Krapp M, et al. Doppler ultrasound of the uterine artery in the prediction of severe complications during low-risk pregnancies. Arch Gyneeol Obstet, 2005, 271 (1): 46-52.
8Khong Y, Brosens I. Defective deep placentation. Best Pract Res ClinObstet Gynaecol, 2011, 25 (3): 301-311.
9Kim SY, Chung MY, Han JH, et al. Increased sFlt-1 to PLGF ratio in women who subsequently develop preeclampsia. J Korean MedSci, 2008, 22 (5) 873 877.
