5McChesney R, Wilcox AJ, O'Connor JF, et al. Intact HCG, free HCG beta subunit and HCG beta core fragment: longitudinal patterns in urine during early pregnancy [J]. Hum Reprod, 2005, 20 (4): 928-935.
6Ong CY, Liao AW, Spencer K, et al. First trimester maternal serum free beta human chorionic gonadotrophin and pregnancy associated plasma protein A as predictors of pregnancy complications [J]. BritJ Obstet Gynaecol, 2000, 107 (10): 1265-1270.
7Gurbuz A, Karateke A, Mengulluoglu M, et al. Can serum HCG values be used in the differential diagnosis of pregnancy complicate by hypertension [J].Hypertens Pregnancy, 2004, 23 (1): 1 - 12.
8Lepage N, Chitayat D, Kingdom J, et al. Association between second-trimester isolated high maternal serum maternal serum human chorionic gonadotropin levels and obstetric complications in singleton and twin pregnancies [J]. Am J Obstet Gynecol, 2003, 188 (5): 1354- 1359.
9Yoshihiro K, Makoto K, Takao S, et al. Interleukin-1 stimulates cytokines, prostaglandin E2 and matrix metalloproteinase-1 production via activation of MAPK/AP-1 and NF-kappaB in human gingival fibroblasts[J]. Cytokine, 2005, 29 (4): 159-168.
10Monzn-Bordonaba F, Vadillo-Ortega F, Feinberg RF. Modulation of trophoblast function by tumor necrosis factor-alpha: a role in pregnancy establishment and maintenance [J]. Am J Obstet Gynecol, 2002, 187 (6): 1574-1580.