Our study has certain limitations. The study findings are limited in terms of overall generalization and impact since it is not all pregnant women identified in Sagamu local government area actually deliver in these PHC clinics; most women deliver in other facilities or at home. Furthermore, applying the questionnaire in the health facility could lead to social desirability bias and the limitations of a cross-sectional study to explore risk and protective factors are important limitations of this study. Despite these limitations, we believe that our data provide useful information for the assessment of the prevalence of teenage pregnancy in Nigeria and identify factors associated with its perpetuation in Nigeria and other low income countries.