Success rate of artificial insemination, reproductive performance and economic impact of failure of first service insemination: a retrospective study

Tadesse, Belege; Reda, Abadi Amare; Kassaw, Nuredin Teshale; Tadeg, Wedajo Muleta

doi:10.1186/s12917-022-03325-1

Cited by 19 publications

(14 citation statements)

References 28 publications

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“…The economic health of the farm is directly impacted by the cows' first-service conception rate. Although the percentage success of the first service ranged from 26.7 to 50.7% in prior research ( 6 , 7 ), conception during the first service after calving is crucial for cows to operate at their best reproductively. The expense of semen and the work required for heat checking and breeding for numerous AI are modest for this group ( 8 ).…”

Section: Introductionmentioning

confidence: 94%

Economical implications and the impact of gonadotropin-releasing hormone administration at the time of artificial insemination in cows raised in the extensive system in North Romania

Berean¹,

Bogdan²,

Opris³

et al. 2023

Front. Vet. Sci.

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Artificial insemination (AI) is the first and the most used biotechnologies in reproduction all over the world. Many studies reported the beneficial role of gonadotropin-releasing hormone (GnRH) administrated some hours before the AI or at the artificial insemination time. This study aimed to assess the effect of GnRH analogs given at the time of insemination on the first, second, and third AIs and to assess the economical implications of GnRH administration. We hypothesized that administration of GnRH at the time of insemination would increase ovulation and pregnancy rate. The study was conducted on small farms in northwestern Romania and included animals of the Romanian Brown and Romanian Spotted breeds. Animals in estrous at the first, second, and third inseminations were randomly divided into groups that received GnRH at insemination and groups that did not. A comparison between the groups was performed and the cost of GnRH administration to obtain one gestation was calculated. The GnRh administration increased the pregnancy rate at the first and the second inseminations by 12 and 18%, respectively. For one pregnancy, the cost of GnRH administration was approximately 49 euros for the first insemination group and around 33 euros for the second insemination group. No improvement of the pregnancy rate was observed after the GnRH administration for the cows at the third insemination, so, for this group, no economic statistics were performed.

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Section: Introductionmentioning

confidence: 94%

Economical implications and the impact of gonadotropin-releasing hormone administration at the time of artificial insemination in cows raised in the extensive system in North Romania

Berean¹,

Bogdan²,

Opris³

et al. 2023

Front. Vet. Sci.

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“…Mekonnen et al (2010) on the other hand, discovered that the rst service NRR in the retrospective and eld follow-up studies was 86.6% and 48.2 %, respectively. Furthermore, a retrospective study by Tadesse et al(2022) revealed that the NRR at rst insemination was 86.55%. The effects of sire, calving season, and dam age on NRR at 60 and 90 days were signi cant (P < 0.05).…”

Section: Calving Interval (Ci) and Days Open (Do)mentioning

confidence: 99%

Horro and their crossbred dairy cow’s reproductive performance in Ethiopia subhumid tropical environments

Jalata

Goshu

Mediksa

et al. 2022

Preprint

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The estrus detection system, proper time of insemination, feeding, and health care practices each make a significant contribution towards the herd's optimal breeding efficiency and lifetime production. In the subhumid environments of Ethiopia, the age at first calving, days open, calving to first heat, and services per conception are economic traits in the reproductive performance of Horro and their crossbred dairy cows. As a result, data collected at Ethiopia's Bako Agricultural Research Center from 1980 to 2019 were used to study the reproductive performance of Horro and their crosses with Holstein Friesian and Jersey dairy cows. The overall mean ± standard error of age at first service (AFS), age at first calving (AFC), number of services per conception (NSP), calving interval (CI), days open (DO), conception rate (CR), and replacement rate (RR) were 29.2±0.2 months, 39.8±0.2months,1.76±0.4, 13.2±0.3 months, 94.3±4.3 days, 75.0±1.3%, and 28.4±0.3%, respectively. At 60 and 90 days, the odds ratio of the nonreturn rate (NRR) was 0.22 and 0.96, respectively. The breeds (sire and dam) and birth period had a significant (P < 0.001) influence on AFS and AFC, whereas season and dam parity had a significant influence on CI and DO. Inconsistent management in feeding, heat detection, inseminator skills, insemination time, health, and other husbandry practices may result in extended periods of AFS, AFC, CI, and DO. To improve the reproductive performance of Horro and their crosses with Holstein Friesian and Jersey dairy cows in Ethiopia's subhumid environments, we should focus on increasing management factors.

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“…Bovine cloning by somatic cell nuclear transfer (SCNT) has the potential for application in the continuation of germplasm from animals with superior traits and has been widely employed to produce genome-edited animals for breed improvement. [1][2][3] Higher cloning efficiency (5%-10%) has been demonstrated in bovine as compared to other mammalian species 4,5 ; however, production rates from bovine SCNT remain dramatically lower than those from embryos generated in vivo (50%-80%), 6,7 limiting its practical application.…”

Section: Introductionmentioning

confidence: 99%

Chromatin accessibility memory of donor cells disrupts bovine somatic cell nuclear transfer blastocysts development

Huang¹,

Zhang²,

et al. 2023

The FASEB Journal

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The post‐transfer developmental capacity of bovine somatic cell nuclear transfer (SCNT) blastocysts is reduced, implying that abnormalities in gene expression regulation are present at blastocyst stage. Chromatin accessibility, as an indicator for transcriptional regulatory elements mediating gene transcription activity, has heretofore been largely unexplored in SCNT embryos, especially at blastocyst stage. In the present study, single‐cell sequencing assay for transposase‐accessible chromatin (scATAC‐seq) of in vivo and SCNT blastocysts were conducted to segregate lineages and demonstrate the aberrant chromatin accessibility of transcription factors (TFs) related to inner cell mass (ICM) development in SCNT blastocysts. Pseudotime analysis of lineage segregation further reflected dysregulated chromatin accessibility dynamics of TFs in the ICM of SCNT blastocysts compared to their in vivo counterparts. ATAC‐ and ChIP‐seq results of SCNT donor cells revealed that the aberrant chromatin accessibility in the ICM of SCNT blastocysts was due to the persistence of chromatin accessibility memory at corresponding loci in the donor cells, with strong enrichment of trimethylation of histone H3 at lysine 4 (H3K4me3) at these loci. Correction of the aberrant chromatin accessibility through demethylation of H3K4me3 by KDM5B diminished the expression of related genes (e.g., BCL11B) and significantly improved the ICM proliferation in SCNT blastocysts. This effect was confirmed by knocking down BCL11B in SCNT embryos to down‐regulate p21 and alleviate the inhibition of ICM proliferation. These findings expand our understanding of the chromatin accessibility abnormalities in SCNT blastocysts and BCL11B may be a potential target to improve SCNT efficiency.

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Success rate of artificial insemination, reproductive performance and economic impact of failure of first service insemination: a retrospective study

Cited by 19 publications

References 28 publications

Economical implications and the impact of gonadotropin-releasing hormone administration at the time of artificial insemination in cows raised in the extensive system in North Romania

Economical implications and the impact of gonadotropin-releasing hormone administration at the time of artificial insemination in cows raised in the extensive system in North Romania

Horro and their crossbred dairy cow’s reproductive performance in Ethiopia subhumid tropical environments

Chromatin accessibility memory of donor cells disrupts bovine somatic cell nuclear transfer blastocysts development

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