6Oliveira FG, Abdelmassih VG, Diamond MP et al. Uterine cavity find- ings and hysteroscopic interventions in patients undergoing in vitro ferti- lization -embryo transfer who repeatedly cannot conceive [ J] . Fertility and Sterility, 2003, 80 (6) : 1371.
7Rama Raju GA, Shashi Kumari G, Krishna KM et al. Assessment of u- terine cavity by hysteroscopy in assisted reproduction programme and its influence on pregnancy outcome [ J] . Archives of Gynecology and Ob- stetrics, 2006, 274 (3) : 162.
8Makrakis E, Pantos K. The outcomes of hysteroscopy in women with im- plantation failures after in - vitro fertilization: findings and effect on subsequent pregnancy rates [ J ] . Current Opinion in Obstetrics and Gynecology, 2010, 22 (4): 339.
9La Sala GB, Montanari R, Dessanti L et al. The role of diagnostic hyste- roscopy and endometrial biopsy in assisted reproductive technologies [J] . Fertility and Sterility, 1998, 70 (4) : 378.
10Karayalcin R, Ozcan S, Moraloglu O et al. Results of 2 500 office - based diagnostic hysteroscopies before IVF [ J ] . Reproductive Bio- medicine Online, 2010, 20 (5): 689.