1Chang Y,lee JN,Yang CH,et al.An unexpected quadruplet heterotopic pregnancy after bilateral salpingectomy and replacement of three embryos[J].Fertil,2003,80(1):218-220.
2Tulandi T,Al﹣Jaroudi D.Interstitial pregnancy:results generated from the society of reproductive surgeons registry[J].Obstet Gynecol,2004,103(1):47-50.
3Tal J,Hsddad S,Gordon IV,et al.Heterotpic pregnancy after ovulation induction and assisted reproductive[J].Fertil Steril,1996,66(1):1.
