Determinants of adolescents' sexual behaviours A cross-sectional study of Newala District, Tanzania. This book is in line with the increasing global awareness on the inevitable limits of the socio-cognitive theories in studying sexual behaviours and of the need to compliment with ecological models.Based on a cross sectional study of sexual practices among secondary school adolescents of Newala district in Tanzania,this book views individual and environmental factors as integral in addressing adolescents sexual practices. It provides a better understanding of those factors that affect adolescents sexual behaviours. It is an invaluable resource for policy makers, managers, researchers and other stakeholders involved in improving and optimising adolescents sexual and reproductive health.