摘要:Brazil has recently experienced declining adolescent fertility and increased school coverage. In this context, adolescent fertility differentials according to educational groups may decrease or even increase. Given the possible different trends in adolescent fertility differentials according to schooling levels, the objective of this study is to compare such differentials, controlled by demographic and socioeconomic variables in 1991, 2000, and 2010 in Brazil. Using data from the Brazilian Demographic Census and estimates of logistic regressions, the main results show consecutive increases in the fertility differentials in adolescence according to educational groups, indicating the existence of an increase of these differentials among censuses. In this way, adolescents with lower education presented an increasing worsening in their chances of preventing fertility when compared to the group of adolescents with nine years or more of schooling.