Mifepristone Use Among Obstetrician-Gynecologists in Massachusetts: Prevalence and Predictors of Use.

Objectives: We estimated the prevalence of mifepristone use for evidence-based indications among obstetrician-gynecologists in independent practice in Massachusetts and explored the demographic and practice-related factors associated with use.

Methods: We used data from a cross-sectional survey administered to Massachusetts obstetrician-gynecologists identified from the American Medical Association Physician Masterfile. We measured the prevalence of mifepristone use for four clinical scenarios: early pregnancy loss, medication abortion, cervical preparation before dilation and evacuation procedures, and cervical preparation before induction of labor. Multivariate regression was used to calculate the odds of mifepristone use for these scenarios based on practice type, years in practice, physician sex, and history of medication abortion training.

Results: A total of 198 obstetrician-gynecologists responded to the survey (response rate = 29.0%); this analysis was limited to 158 respondents who were not in residency or fellowship. Overall, 46.0% used mifepristone for early pregnancy loss and 38.6% for medication abortion. Fewer used mifepristone for cervical preparation before dilation and evacuation (26.0%) or before induction of labor (26.4%). Respondents in academic practice settings, with more years in practice, of female sex, and with sufficient medication abortion training were significantly more likely to use mifepristone for one or more evidence-based clinical indications.

Conclusions: Sufficient medication abortion training during residency significantly predicts whether obstetrician-gynecologists use mifepristone in practice. The U.S. Supreme Court's overturning of Roe v. Wade will allow state-level abortion bans and restrictions to be in effect, which will reduce exposure to abortion training during residency. Increasing training in and utilization of mifepristone are critical for equitable access to reproductive health services. Further interventions may need to be developed to increase mifepristone use in nonacademic practice settings.