8Michalas S, Minaretzis D, Tsionou C, et al. Pelvic surgery, reproductive factors and risk of ectopic pregnancy : a case controlled study [ J ]. Int J Gynaecol Obstet, 1992,38 ( 2 ) : 101-105.
9Menon S, Sammel MD, Vichnin M, et al. Risk factors for ectopic pregnancy: a comparison between adults and adolescent women[ J]. J Pediatr Adolesc Gynecol,2007,20 ( 3 ) : 181-185.
10Smith C, Bush J, Sutija VG. Adverse obstetric history and ectopic pregnancy [ J ]. J Reprod Med ,2007 ,52 (9) : 801-804.