This article analyzes the risk factors associated with unwanted pregnancy (END) and sexually transmitted diseases (STD) in adolescents and young schoolchildren in Colombia. For this purpose, it was based on a qualitative, phenomenological, documentary-bibliographic methodology, taking as the main collection method referential sources from the Digital Repository: Universidad de Caldas (Ucaldas), Universidad de Santander (UDES), Universidad de la Guajira (Uniguajira), Universidad Simon Bolivar (Unisimon), Universidad Cooperativa de Colombia (UCC), Universidad Santiago de Cali (USC), Universidad de Cartagena (UdeC) Revista Ciencia y Cuidado de UFPS, Revista Scielo Sanus, Revista Espanola de Salud Publica, Informe digital de Profamilia, 11 references were taken into account among articles and research that provided important conclusive data for the analysis. It was determined that the social phenomenon of unwanted pregnancy and the transmission of sexual diseases is a problem that has increased, affecting more and more young people in the country. In addition, there are risk factors that indicate this situation, such as scarce or inappropriate knowledge about sexual and reproductive health, irresponsible sexual practices initiated at an early age (less than 15 years old) for which adolescents and young people are not prepared to face the responsibility that sex implies.