1993, Number 3

Contents

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Reproductive biotechnology: Advances in cattle

Salvador Romo García

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Estimation of genetic progress in Mexican Holstein herds

Javier Rosales Alday; AssefawTewolde Medhin

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Epidemiological study of gastrointestinal parasites in bovines in the State of Yucatan, México

José Luis Domínguez Alpízar; Roger Iván Rodríguez Vivas; Nick Honhold

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Frequency of gastroenteric lungworms and hepatic parasites in sheep in Magdalena Soltepec, Tlaxcala, Mexico

Silvia George Sánchez; Quiroz Romero, Héctor

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Prevalence of parasites and their histological lesions in tilapia from the lake of Amela, Tecoman, Colima, Mexico

Luis Jorge García M; David Osorio Sarabia; Fernando Constantino

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Performance of undergraded broiler chick

Arce Menocal, José; Ávila González, Ernesto; López Coello, Carlos

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Effect of levels of metabolizable energy on the performance of broiler chickens

Oscar Alpízar Salas; López Coello, Carlos; Gerardo Peñalva García; Carlos Vásquez Peláez; Ávila González, Ernesto

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Immune profile in pigs during the first ten weeks of age

Dolores González Vega; Isabel Cisneros Morales; Marco Antonio Vega López; Antonio Morilla González

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Antibodies obtention against progesterone and estradiol, radioimmunoassay standardization and validation in ruminant serum

María del Refugio Herrera Díaz; Maricela Luna Muñoz; Carlos Manuel Romero Ramírez

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Fertility, prolificacy and lamb survival in a commercial flock of Suffolk sheep

Luz María Bonilla Angeles; Glafiro Torres Hernández; Moisés Rubio Rubio

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Frequency of Fasciola hepatica in bullfight farms in the Tlaxcala State in Mexico

Luis René Pliego Suárez; Guerrero Molina, Cristina; Quiroz Romero, Héctor; Javier Arriola Bueno

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Frequency by four diagnostic techniques in bulls slaughtered at the Plaza Mexico

Alvaro Morán Ramos; Quiroz Romero, Héctor; Guerrero Molina, Cristina; Martha Huerta Martínez

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Subepiglottic cyst in a neonatal foal

Marcela Alcántara Pohls; María Masri Daba

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Report about exploratory laparotomies in horses with acute abdominal pain

María Masri Daba; José Luis Velázquez Ramírez; Jill McClure