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Effect of estrus synchronization and artificial insemination on reproductive performance of Merino sheep Braz. J. Vet. Res. Anim. Sci.
Simonetti,Laura; Ramos,Guillermo; Gardón,Juan Carlos.
The experiment was conducted to determine the reproductive performance (lambing rate and litter size) of sheep artificially inseminated at a synchronized estrus in relation to rams, dose of PMSG and number of artificial inseminations performed. During spring cyclic Merino adult ewes were treated with intravaginal sponges impregnated with 60 mg medroxyprogesterone acetate (MAP). After 14 days sponges were removed and the females received an intramuscular injection of either 375 or 400 IU pregnant mare serum gonadotropin (PMSG). Estrus detection was performed with vasectomized rams. Females in estrus were cervically inseminated with fresh diluted semen from different rams either once or twice. Data on lambing rate and litter size were recorded. Lambing rate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sheep; Reproductive performance; Artificial insemination; PMSG; Rams.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962002000300006
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