To assess changes in the proportion of Texas residents, gestational age at time of
abortion, and rates of second-trimester abortion, at a university-affiliated abortion
clinic in Colorado after Texas passed Senate Bill 8 (SB8), which prohibits abortions
>6 weeks’ gestation.
We focused on all patients obtaining an abortion ≤22 weeks’ gestation at a university-affiliated
clinic between January 2018 and mid-April 2022. We created two time periods: before
SB8 (January 2018–August 2021) and after SB8 (September 2021–April 2022). We compared
the proportion of Texas residents obtaining care and gestational age categories before
and after SB8 using chi-square tests. We determined the adjusted odds of a second-trimester
abortion (≥13 weeks) after SB8 using logistic regression models adjusted for gravida,
parity, age, and the proportion of Texas residents.
We assessed 4,358 abortions; 3,630 before and 728 after SB8. After SB8, the proportion
of patients who were Texas residents increased from 1% to 17%, p<0.001. Among all
patients, abortions ≥15 weeks increased from 11% to 21%, p<0.01, and surgical abortions
at 6–10 weeks decreased from 46% to 33%, p<0.001. There was no change in abortions
at 11–14 weeks. The proportion of second-trimester abortions increased from 17% to
27%, p<0.001 and the odds nearly doubled after SB8 (aOR1.9, 95% CI, 1.6–2.3). Although
higher among Texas residents (aOR, 2.6, 95% CI,1.1–6.9), the odds of a second-trimester
abortion also increased among Colorado residents (aOR,1.8, 95% CI, 1.4–2.2).
Post-Roe abortion bans will likely delay care not only for people forced to seek care out
of state, but for residents of states maintaining abortion access.