Association between contraceptive method chosen after induced abortion and incidence of repeat abortion in Northern Portugal

Abstract

Objectives In Portugal, a country with strong Catholic roots, elective termination of pregnancy at women’s request is still stigmatised, especially if it is a repeat abortion. The objectives of this study were to determine the incidence of repeat abortion, taking into account the contraceptive method chosen after the index abortion event, and characterise the risk factors for repeat abortion. Methods This was a retrospective cohort study of 988 women who requested termination of pregnancy during 2015 in a Portuguese tertiary care public hospital. Contraception was given free of charge after the index event. The occurrence of a repeat induced abortion was evaluated during a 24 month follow-up period. Results Forty-nine (5.0%) of the 988 women had a repeat abortion. Users of long-acting reversible contraception (LARC) had fewer repeat abortions compared with users of non-LARC methods. Overall repeat abortion was 0.8% in subcutaneous contraceptive implant users, 1.5% in intrauterine contraceptive device (IUCD) users, 2.8% in vaginal ring users and 5.8% in oral contraceptives users (p < 0.05). Cox hazards ratio (HR) analysis showed that method choice after abortion correlated significantly with the probability of repeat abortion (p < 0.05). Using women choosing oral contraception as the reference group, the HRs (95% CIs) for repeat abortion were as follows: IUCD 0.282 (0.084, 0.942), contraceptive implant 0.142 (0.019, 1.050), vaginal ring 0.508 (0.175, 1.477). Conclusion Even though highly effective contraceptive methods are freely accessible in Portugal, other challenges must be managed to improve outcomes, such as a timely, patient-centred counselling approach.