Understanding medication abortion ineligibility due to gestational age among a cohort of patients in Southern California

Objective: Medication abortion (MAB) is safe and effective up to 77 days gestation. Limited data are available on how often patients are ineligible for MAB due to advanced gestational age and how many of those ineligible go on to receive procedural abortion.

Study design: Retrospective analysis of electronic health records from Planned Parenthood of the Pacific Southwest (PPPSW) from January - December 2021. PPPSW has four procedural abortion sites and 15 MAB-only clinics that offered appointments only if last menstrual period-based GA was ≤70 days or unknown. Patients >70 days gestation by intake ultrasound at a MAB-only clinic were referred to a procedural center.

Results: Of 11,684 patients presenting for MAB at MAB-only sites 2224 (19%) did not receive a MAB; 3.8% (N = 444) presented past 70 days gestation and were thus ineligible due to gestational age limits. Of those ineligible (N = 444), 234 (53%) measured between 71-77 days of gestation. Three quarters (75.7%) of those ineligible went on to receive a procedural abortion at PPPSW after a mean wait time of 10 days. In multivariable analysis, no demographic factors were associated with higher odds of receiving a procedural abortion.

Conclusions: Presenting for MAB past a gestational age limit was uncommon, supporting safety of no-test MAB protocols. A quarter of people ineligible for MAB due to gestational age did not receive a procedural abortion at PPPSW. If MAB were offered up to 77 days, half of patients who were denied MAB due to gestational age could have received MAB, expanding patient access.

Implications: Being ineligible for MAB due to advanced gestational age was uncommon. Increasing MAB gestational age limits from 70 days to 77 days could further improve abortion access.