Conception rate and pregnancy loss in fixed-time cattle embryo transfer programs are related to the luteal blood perfusion but not to the corpus luteum size

Gustavo Martins Gomes dos Santos, Luis Bortolassi, Kátia Cristina Silva-Santos, José Henrique Ayres Dias, Ivis da Silva Dias, Marcelo Marcondes Seneda, Fábio Morotti