1. Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil.
2. Section of Experimental Endocrinology, Department of Pharmacology, Federal University of Sao Paulo, Sao Paulo, Brazil.
3. Department of Animal Reproduction, Faculty of Veterinary Medicine; University of Sao Paulo, Sao Paulo, Brazil.