The effect of induction duration on postabortal hemorrhage in second-trimester pregnancy termination with misoprostol

Objective: The aim was to investigate how the duration of induction affects postabortion hemorrhage in second-trimester pregnancy termina- tions using misoprostol. Methods: This single-center retrospective cohort study was conducted between April 2020 and April 2021 at a university hospital. Singleton pregnant women having gestational age of 13–26 weeks and being hospitalized for termination were included in the study. The misoprostol was administered 200 μg every 4 hours intravaginally to patients already diagnosed with miscarriage, and 400 μg every 3 hours to all remaining patients. Estimated blood loss volume (EBLV) was calculated using a formula previously defined by Stafford et al. A total of 117 singleton pregnant women having gestational age of 13–26 weeks and being hospitalized for pregnancy termination were included in the study. Of these, 78 patients aborted within 0–24 hours (Group 2). The remaining 39 patients aborted in more than 24 hours (Group 1). Results: The EBLV was higher in the study group (p=0.003). In addition, the rate of patients with ≥ 500 cc and ≥ 1000 cc blood loss was also significantly higher in the study group (p values 0.049 and 0.016, respectively). After adjusting for potential confounder factors, the probability of blood loss of ≥ 500 cc and ≥ 1000 cc was found to be higher in the study group (adjusted OR: 2.720, 95% CI: 1.12–6.58 and adjusted OR: 6.987, 95% CI: 1.25–38.98, respectively). Conclusion: Postabortion hemorrhage risk was found to be higher in patients whose induction period lasted longer than 24 hours in sec-ond-trimester terminations with misoprostol. However, there was no deterioration in the patient’s clinical status and no increase in transfusion rates. Care should be taken with regard to vaginal bleeding in misoprostol applications lasting longer than 24 hours.