Vaginal Dinoprostone Administration Prior to an Intrauterine Device Insertion in Multiparous Women.

Inclusion Criteria: * multiparous women aged over 18 years of age requesting an IUD for contraception, had a negative pregnancy test. Exclusion Criteria: * currently pregnant or were pregnant within 6 weeks of study entry * had a prior attempted or successful IUD insertion * had a history of a cervical procedure such as cone biopsy, Loop electrosurgical excision procedure, or cryotherapy * any World Health Organization Medical Eligibility Criteria category 3 or 4 precaution to an IUD * active vaginitis or cervicitis * undiagnosed abnormal uterine bleeding * pelvic inflammatory disease within the last 3 months * fibroids or other uterine abnormalities distorting the uterine cavity * contraindication or allergy to dinoprostone.