Influence of the development phase of the dominant follicle on the superovulatory response in Nelore heifers - Assumpção, Mayra Elena Ortiz D'Ávila; Madureira, Ed Hoffmann; Arruda, Rubens Paes de; Celeghini, Eneiva Carla Carvalho; Gusmões, Pedro Paulo Gimenez; Candini, Pedro Henrique; Visintin, Jose Antonio (Brazilian Journal of Veterinary Research and Animal Science, 1999)