BackgroundAdolescent sexual activity, early pregnancy, induced abortion and the increase in HIV infection have become major concerns in sub-Saharan Africa and understanding adolescent sexual behaviour remains a challenge. In the Democratic Republic of Congo (DRC), the practice of illegal abortions is prevalent among school-going adolescent girls with unplanned pregnancies. Assessing their attitude and knowledge on the subject could be a starting point from which to address the problem.ObjectivesTo determine the knowledge of schoolgirls in Goma, DRC about the health consequences of illegal abortions and to assess their attitude towards these abortions.MethodA descriptive cross-sectional study was conducted among a randomly selected sample of 328 high school girls aged 16 to 20 years. A pre-tested, self-administered questionnaire was used for data collection. Nine out of 55 (11 public and 44 private) secondary schools were randomly selected for inclusion in the study. The Epi-Info 2000 computer program was used for data capturing and analysis.ResultsThe different sources of information were the radio (66.2%, 217), friends (31.7%, 104), parents (1.5%, 5), and the church (0.5%, 2). The health consequences of illegal abortion mentioned were death, infertility, infection and bleeding. Of the participants, 9.8% (32) had committed an abortion before and 46% (151) knew where to obtain it; 76.2% (250) of participants were against illegal abortion, while 23.8% (78) supported it.ConclusionGirls in secondary school in Goma had good knowledge of the illegal abortion practice and its consequences. A fifth of them were in support of the procedure. The DRC government may need to consider legalising abortion to secure a healthy future for affected girls.