The main purpose of this little book is to make available to professionals, students, livestock producers and professionals, students, livestock producers and those who are passionate about reproduction and genetics enthusiasts, particularly in veterinary and zootechnical veterinary medicine and zootechnics, a modest work that is the heritage of the of basic knowledge treasured by animal science and the experiences of good practices in the of good practices in the selection of sires and their impact on the genetic improvement of domestic animals. genetic improvement in domestic animals.

Doutor em Medicina Veterinária. Prémio Nacional de Medicina Veterinária por méritos científicos. Professor de Biotecnologia da Reprodução. Chefe do Departamento de Reprodução e Genética. Professor de Andrologia e Inseminação Artificial no Mestrado em Reprodução Animal e em Metodologia da Investigação Científica.