6Pakarinen PI, Lahteenmaki P, Lehtonen E et al. The ultra - structure of human endometrium is altered by administration of intrauterine levonorgestrel. Hum Reprod, 1998, 13:1846
8Catenacci M, Sastry S, Falcone T. Laparoscopic surgery for endometriosis[J]. Clin Obstet Gynecol, 2009, 52 (3) :351- 361.
9Sheng J,Zhang WY,Zhang JP,et al. The LNG-IUS study on adenomyosis: a 3-year follow-up study on the efficacy and side effects of the use of levonorgestrel intrauterine system for the treatment of dysmenorrhea associated with adenomyosis[J]. Contraception, 2009,79(3) :189-193.
10Esher C. Intrauterine devices and intrauterine systems[J]. Hum Reprod Update, 2008,14(3) : 197-208.