Comment on

• Ultrasonographic features of the endometrium and the ovaries in women on etonogestrel implant.

  Van den Bosch T, Donders GG, Riphagen I, Debois P, Ameye L, De Brabanter J, Van Huffel S, Van Schoubroeck D, Timmerman D. Van den Bosch T, et al. Ultrasound Obstet Gynecol. 2002 Oct;20(4):377-80. doi: 10.1046/j.1469-0705.2002.00816.x. Ultrasound Obstet Gynecol. 2002. PMID: 12383321
• Comparison of ovarian cyst formation in women using the levonorgestrel-releasing intrauterine system vs. hysterectomy.

  Inki P, Hurskainen R, Palo P, Ekholm E, Grenman S, Kivelä A, Kujansuu E, Teperi J, Yliskoski M, Paavonen J. Inki P, et al. Ultrasound Obstet Gynecol. 2002 Oct;20(4):381-5. doi: 10.1046/j.1469-0705.2002.00805.x. Ultrasound Obstet Gynecol. 2002. PMID: 12383322 Clinical Trial.