6Chung K,Allen R.The use of serial human chorionic gonadotropin levels to establish a viable or a nonviable pregnancy[J].Semin Reprod Med,2008,26(5):383-387.
7Seeber BE,Sammel MD,Guo W,et al.Application of redefined human chorionic gonadotropin curves for the diagnosis of women at risk for ectopic pregnancy[J].Fertil Steril,2006,86(2):454-459.
8Daponte A,Pournaras S,Zintzaras E,et al.The value of a single combined measurement of VEGF,glycodelin,progesterone,PAPP-A,HPL and LIF for differentiating between ectopic and abnormal intrauterine pregnancy[J].Hum Reprod,2005,20:3163-3166.
9Mueller MD,Raio L,Spoerri S,et al.Novel placental and nonplacental serum markers in ectopic versus normal intrauterine pregnancy[J].Fertil Steril,2004,81:1106-1111.
