Liliana Salazar-Redon interviews Laurent Dupont regarding the 4th Study Day by the Institute of the Child, that will take place on March 18 2017 in Issy-les-Moulineaux and the theme will be ”After Infancy”. This day will continue the orientation proposed by Jacques-Alain Miller in his conference “In the direction of adolescence” given during the last Study Day of the Institute of the child. The axis of the work will be: the construction of adolescence, the times of metamorphosis; girls and boys, between infancy and adolescence. new explosions of the body; knowledge as event, symptoms of socialization.