Using the same CIDR up to three times for estrus synchronization and artificial insemination in dairy goats - doi: 10.4025/actascianimsci.v33i3.10120

• Autor(a) principal: Nogueira, Daniel Maia
• Data de Publicação: 2011
• Outros Autores: Lopes Júnior, Edilson Soares, Peixoto, Rodolfo Moraes de, Christilis, Madriano, Martins, Samara Rodrigues, Monte, Alane Pains Oliveira do
• Tipo de documento: Artigo
• Idioma: por; eng
• Título da fonte: Acta Scientiarum. Animal Sciences (Online)
• Texto Completo: https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10120
• topic: hormone treatment; small ruminant; Tropical region; vaginal device; hormone treatment; small ruminant; Tropical region; vaginal device; Reprodução Animal

The objective of this study was to evaluate the effectiveness of reusing a controlled internal drug release (CIDR) device for up to three times in the reproductive performance of dairy goats raised in the semi-arid zone of northeastern Brazil. Forty-five goats were allocated into three hormone treatments, as follows: CIDR1x, treated with new CIDR during nine days. Two days prior to device removal, injections of 75 µg d-cloprostenol and 300 IU equine chorionic gonadotropin (eCG) were administrated. For the other treatments, the same hormone protocol was used, differing only by the use of the same CIDR for a second time in CIDR2x and for a third time in CIDR3x. The interval from device removal to the onset of estrus (13.3 ± 1.1h vs. 13.8 ± 2.6h vs. 13.3 ± 1.4h), as well as estrus duration (33.6 ± 7.3h vs. 29.6 ± 3.2h vs. 32.8 ± 4.5h), did not differ (p > 0.05) among groups CIDR1x, CIDR2x and CIDR3x, respectively. All synchronized females were found to be in estrus. The overall fertility and prolificacy after artificial insemination were 82.2% and 1.9 kids, respectively, without significant difference (p > 0.05) among treatments. The use of the same CIDR for up to three times was effective using 9-day estrus synchronization protocols in dairy goats.