This thesis is based on the following original publications, which are referred to in the text by their Roman numerals. In addition, some unpublished material is presented.

I Härkki-Sirén P, Sjöberg J. Evaluation and the learning curve of the first one hundred laparoscopic hysterectomies. Acta Obstet Gynecol Scand 1995;74:638-641.
II Härkki-Sirén P, Sjöberg J, Mäkinen J, Heinonen PK, Kauko M, Tomás E, Laatikainen T. Finnish national register of laparoscopic hysterectomies: A review and complications of 1165 operations. Am J Obstet Gynecol 1997;176:118-122.
III Härkki-Sirén P, Sjöberg J, Toivonen J, Tiitinen A. Clinical outcome and tissue trauma after laparoscopic and abdominal hysterectomy: a randomized controlled study. Submitted for publication.
IV Härkki-Sirén P, Sjöberg J, Tiitinen A. Urinary tract injuries after hysterectomy. Obstet Gynecol 1998;92:113-118.
V Härkki-Sirén P, Kurki T. A nationwide analysis of laparoscopic complications. Obstet Gynecol 1997;89:108-112.
VI Härkki-Sirén P, Sjöberg J, Kurki T. Major complications of laparoscopy: a follow-up Finnish Study. Obstet Gynecol 1999,94:94-98.