Assessment of the Use of Contraceptives among Female in-School Adolescents in Port Harcourt City of Rivers State, Nigeria: it is obvious that female adolescents in Port Harcourt City are exposed to varying types of sexual assaults like rape, unwanted pregnancy, abortion, HIV/AIDS leading to death of most adolescents within the city of Port Harcourt of rivers state. The findings of this study will help female adolescents who have fallen prey or victims' to the consequences of unprotected sexual activities due to ignorance of contraceptive devices and its utilization as this study may help to prevent future occurrence of unwanted pregnancies.