• Alisa B Goldberg, Jennifer A Fortin, Eleanor A Drey, Gillian Dean, E Steve Lichtenberg, Paula H Bednarek, Beatrice A Chen, Caryn Dutton, Sarah McKetta, Rie Maurer, Beverly Winikoff, and Garrett M Fitzmaurice.
• Harvard Medical School, Boston, Massachusetts; Brigham and Women's Hospital, Boston, Massachusetts; Planned Parenthood League of Massachusetts, Boston, Massachusetts; the University of California, San Francisco, San Francisco, California; Ichan Mount Sinai School of Medicine, New York, New York; Planned Parenthood of New York City, New York, New York; Northwestern University Feinberg School of Medicine, Chicago, Illinois; Family Planning Associates, Chicago, Illinois; Oregon Health & Science University, Portland, Oregon; the University of Pittsburgh, Pittsburgh, Pennsylvania; Gynuity Health Projects, New York, New York; and McLean Hospital, Boston, Massachusetts.
• Obstet Gynecol. 2015 Sep 1; 126 (3): 599-609.

ObjectiveTo evaluate operative time after adjunctive misoprostol or mifepristone compared with overnight osmotic dilators alone for cervical preparation before dilation and evacuation at 16-23 6/7 weeks of gestation.MethodsThis double-blind, three-arm, multicenter, randomized trial compared overnight osmotic dilators alone, dilators plus 400 micrograms buccal misoprostol 3 hours preoperatively, and dilators plus 200 mg oral mifepristone during dilator placement for dilation and evacuation. Our primary outcome was dilation and evacuation operative time within two cohorts: 16-18 6/7 weeks of gestation (N=150) and 19-23 6/7 weeks of gestation (N=150). Three hundred women were required for 80% power to detect a 2-minute difference in operative time. Secondary outcomes included initial cervical dilation, side effects, physician satisfaction by Likert scale, and complications.ResultsBetween February 2013 and February 2014 we randomized 300 women evenly across treatment arms. Group demographics were similar. We found no difference in operative time in either gestational cohort (early cohort [minutes]: 5.11±3.0 dilators alone, 4.99±3.3 misoprostol, 4.33±2.0 mifepristone, P=.34; late cohort [minutes]: 7.50±3.7 dilators alone, 7.62±5.4 misoprostol, 6.74±3.2 mifepristone, P=.53). In the early cohort, initial dilation was greater with misoprostol than dilators alone (2.4 compared with 2.0 cm, P=.007). Patients given misoprostol had significantly more pain, fever, and chills. In the late cohort, dilation and evacuation procedures were less difficult after mifepristone (4.1%, 95% confidence interval [CI] 0.0-9.6) than misoprostol (18.8%, 95% CI 7.7-29.8) or dilators alone (18.8%, 95% CI 7.7-29.8; P=.04). We had inadequate power to infer differences in complications: dilators alone (10%, 95% CI 4.2-16.0) compared with misoprostol (2%, 95% CI 0-4.7) compared with mifepristone (2%, 95% CI 0-4.8).ConclusionDespite no difference in operative time, adjunctive mifepristone facilitates later dilation and evacuation compared with osmotic dilators alone and is better tolerated than misoprostol.Clinical Trial RegistrationClinicalTrials.gov, www.clinicaltrials.gov, NCT01751087.Level Of EvidenceI.

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