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Charlotte Lozier Institute

Phone: 202-223-8073
Fax: 571-312-0544

2776 S. Arlington Mill Dr.
#803
Arlington, VA 22206

Maternal & Public HealthAbortion Drugs Health Services Research & Managerial Epidemiology

A Longitudinal Cohort Study of Emergency Room Utilization Following Mifepristone Chemical and Surgical Abortions, 1999–2015

Read about how the publisher censored this paper by retracting it and how the authors sued to fight back: See the Assault on Science website and the Arbitration Demand.

Additional Author: Christopher Craver

Abstract

Introduction

Existing research on post abortion emergency room visits is sparse and limited by methods which underestimate the incidence of adverse events following abortion. Post abortion emergency room (ER) use since Food and Drug Administration approval of chemical abortion in 2000 can identify trends in the relative morbidity burden of chemical versus surgical procedures.

Objective

To complete the first longitudinal cohort study of post abortion emergency room use following chemical and surgical abortions.

Methods

A population-based longitudinal cohort study of 423 000 confirmed induced abortions and 121,283 subsequent ER visits occurring within 30 days of the procedure, in the years 1999-2015, to Medicaid-eligible women over 13 years of age with at least one pregnancy outcome, in the 17 states which provided public funding for abortion.

Results

ER visits are at greater risk to occur following a chemical rather than a surgical abortion: all ER visits (OR 1.22, CL 1.19-1.24); miscoded spontaneous (OR 1.88, CL 1.81-1.96); and abortion-related (OR 1.53, CL 1.49-1.58). ER visit rates per 1000 abortions grew faster for chemical abortions, and by 2015, chemical versus surgical rates were 354.8 versus 357.9 for all ER visits; 31.5 versus 8.6 for miscoded spontaneous abortion visits; and 51.7 versus 22.0 for abortion-related visits. Abortion-related visits as a percent of total visits are twice as high for chemical abortions, reaching 14.6% by 2015. Miscoded spontaneous abortion visits as a percent of total visits are nearly 4 times as high for chemical abortions, reaching 8.9% of total visits and 60.9% of abortion-related visits by 2015.

Conclusion

The incidence and per-abortion rate of ER visits following any induced abortion are growing, but chemical abortion is consistently and progressively associated with more post abortion ER visit morbidity than surgical abortion. There is also a distinct trend of a growing number of women miscoded as receiving treatment for spontaneous abortion in the ER following a chemical abortion.

 

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October 6, 2026 A magnifying glass rests on three wooden blocks that spell out FDA, symbolizing a review of the REMS modification. A Critical Analysis of the FDA’s 2021 Mifepristone REMS Modification Rationale Review October 6, 2026 Ultrasound image showing the side profile of a human baby Inside The Government Decision That Opened Up Abortion Pill Floodgates October 6, 2026 A sign for the FDA featuring the agency’s logo and circular seals in front of a brick government building, where clinical guidance for mifepristone REMS is often determined. Unintended Consequences of the FDA’s 2021-2023 Risk Evaluation and Mitigation Strategy (REMS) Changes to Mifepristone

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