The use of artificial photoperiod associated to male effect and male effect alone on reproductive activity in Saanen goats under subtropical conditions in Brazil - Sasa, Aya; Torreão, Jacira Neves da Costa; Coelho, Lia de Alencar; Ivanoff, Arthur; Silva, C C M; Nunes, Bruno César Prosdocini (International Congress on Animal Reproduction, 2004)