Reduction of the Voluntary Waiting Period by Use of Hormonal Protocols and Fixed-Time Artificial Insemination (Ftai) in Dairy Cows

Suplicy, Miriane; Filho, Haroldo Suplicy; Kozicki, Luiz Ernandes; Breda, José Carlos dos Santos; Weiss, Romildo Romualdo; Segui, Marcio Saporski

doi:10.5380/avs.v17i3.21676

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…The cases in which the application of eCG at the moment when the P4 device is removed in dairy cows shown beneficial effects in the conception rate are referred for animals in anoestrus (Bryan et al 2010;García-Ispierto et al 2012), with a low body condition (Souza et al 2009), in old age (Bryan et al 2010) or in heat conditions (Bó et al 2008;Suplicy et al 2012;De Rensis and López-Gatius 2014).…”

Section: Discussionmentioning

confidence: 99%

Effect of equine chorionic gonadotropin on pregnancy rate in Brown Swiss cows under high altitude conditions

Mínguez

Velarde

2020

Journal of Applied Animal Research

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The objective of the present study was to evaluate the administration of Equine Chorionic Gonadotropin (eCG) in a protocol of fixed-time artificial insemination (FTAI) to increase the pregnancy rate in cows subjected to high altitude conditions. These conditions could generate a syndrome of right-sided heart failure and, as consequence, animals trend to have a low body score condition with a decrease in fertility. The research was conducted with 84 lactating cows (Brown Swiss) randomly into two groups with a body condition score between 2.5 and 3.5, allocated at 3100 m above sea level. In the FTAI protocol, 400 IU of eCG was administered (n = 42) or not (n = 42) at progesterone intravaginal device removal. A significant improvement in pregnancy rate was found with eCG treatment in those cows with low body condition score (BCS of 2.5, scale 1-5), while no effect was found in those cows with higher BCS (i.e. 3.0 and 3.5). In conclusion, the addition of 400 IU of eCG in an FTAI in cows under high altitude conditions and low body conditions can improve the fertility.

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Section: Discussionmentioning

confidence: 99%

Effect of equine chorionic gonadotropin on pregnancy rate in Brown Swiss cows under high altitude conditions

Mínguez

Velarde

2020

Journal of Applied Animal Research

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Estrogens improve the pregnancy rate in cattle: A review and meta-analysis

Taghizadeh,

Barati,

Fallah

et al. 2024

Theriogenology

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Use of artificial insemination in dairy herds in Northwestern Rio-grandense, Brazil

Cervo

Jardim-Barcellos

Peripolli

et al. 2022

Rev. colomb. cienc. pecu.

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Background: The use of artificial insemination (AI) in dairy cattle has a direct impact on productivity through genetic improvement and, indirectly, by other technologies that allow for better expression of the genetic potential. Objective: To determine the association between the use of AI and other factors on productive performance of dairy cows. Methods: The study assessed AI impact on 195 dairy farms through the application of structured questionnaires to farmers. Analysis of variance (GLM) was used to evaluate herd milk production and farm size. Multivariate analysis was performed to observe the degree of association between AI and production. Four clusters were formed according to production traits and farm size. Results: Clusters showed high discrimination (90%). Principal factors explained 70% of the variance between clusters. The variables that best explained the variation between clusters were Lactating cows per year, Monthly milk production, Farm area and Total cows. The correspondence analyzes showed that AI use is associated with higher production levels and investment in nutrition, management, genetics, and technology. Conclusion: The use of AI enhances production by increasing productivity and enables greater gains per liter of milk marketed.

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Reduction of the Voluntary Waiting Period by Use of Hormonal Protocols and Fixed-Time Artificial Insemination (Ftai) in Dairy Cows

Cited by 3 publications

References 5 publications

Effect of equine chorionic gonadotropin on pregnancy rate in Brown Swiss cows under high altitude conditions

Effect of equine chorionic gonadotropin on pregnancy rate in Brown Swiss cows under high altitude conditions

Estrogens improve the pregnancy rate in cattle: A review and meta-analysis

Use of artificial insemination in dairy herds in Northwestern Rio-grandense, Brazil

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