3Maj PW, Shannon T, Maj KH. Adnexal masses in pregnancy: A review of 130 cases undergoing surgical managenent[J]. Am J Obstet Gynecol, 1999, 181(1):19-23.
4Kohler MF. The adnexal mass in pregnancy[J]. Postgrad Obstet Gynecol, 1994, 14(1):1-4.
5Lyndon MH, Connors-beatty DT, Anita N, et al. The role of ultrasonography in the detection and managemdnt of adenxal tumoures during the second and third trimesters of pregnancy[J]. Am J Obstet Obstet,1998, 179(6):703-705.