Ologele, INasirat, E. B.Ibrahim, A.Tawakalitu, K. IJoseph, A. S.2023-09-062023-09-062021-03Ologele, I., Bakare, N. E., Abdullahi, I., Ijaodola, T. K. & Stephen, J. A. (2021). HIV/AIDS Assessment of Premarital Sex: Causes among Undergraduates of the University of Ilorin, Ilorin, Nigeria. Journal of Capital Development in Behavioural Sciences, 9(1), 142-157.https://uilspace.unilorin.edu.ng/handle/20.500.12484/11738Undergraduates who engage in pre-marital sex inside and outside the school campuses are on the increase every day. This study investigates assessment of pre-marital sex, and causes among undergraduates the University of Ilorin. The purpose of the study was to assess whether peer group influence, mass media or poverty causes premarital sex among undergraduates in the University of Ilorin. The descriptive research design of survey type was used for the study. The population of the study comprised of all undergraduates reside school halls within the University of Ilorin. A multi-stage sampling technique which comprises of simple, proportionate and convenience sampling procedures were used to select two hundred and thirty (230) respondents out of participants in the ten undergraduates resident in the hostels as participants in the study. Researchers structured questionnaire was used. The reliability of the instrument established through test-retest method. The coefficient obtained was r = 0.83. Inferential statistics of chi-square was used to test the hypotheses developed for the study at 0.05 level of significance. The findings of the study indicated that peer group influence, mass media and poverty are major causes for pre-marital sex (92.83> 21.03, 90.57 > 21.03 and 88.14 >21.03). The researchers concluded that peer group influence, mass media and poverty are major factors responsible for premarital sex among undergraduates in the University of Ilorin. The researchers recommend that the government should improve the economic condition of Nigerian citizens by provision of sufficient funds for education/facilities in all Nigerian secondary and tertiary institutions to reduce the financial problem faced by students in schools due to low financial support from their parents.AssessmentCausesPremaritalSexUndergraduatesArticle