1Iovero G, Nappi L, Vicino M, et al. Uterine cavity assessment in infertile women: comparison of transvaginal sonography and hysteroscopy [J]. Eur J Obstet Gynecol Rprod Biol, 2001,100(1) :67-71.
2Cohen SB, Kalter-Ferber A, Weisz BS, et al. Hysteroscopy may be the method of choice for management of residual trophoblastic tissue[J]. J Am Assoc Gynecoal Laparosc, 2001,8 (2) : 199-202.