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pro vyhledávání: '"Leonel Avendaño-Reyes"'
Autor:
Raúl Díaz-Molina, Abelardo Correa-Calderón, Rolando Pérez-Velázquez, Ulises Macías-Cruz, Leonel Avendaño-Reyes, Fernando Rivera-Acuña
Publikováno v:
Animal Science Journal. 87:745-749
To investigate the effects of progesterone supplementation at two different times on serum progesterone (P4 ) concentration, conception rate and resynchronization of cooled Holstein heifers in summer, 90 heifers were randomly assigned to two groups: