Effect of body condition score and reuse of progesterone‐releasing intravaginal devices on conception rate following timed artificial insemination in Nelore cows

Pereira, LL; Ferreira, AP; Vale, W. G.; Serique, LR; Neves, K. A. L; Morini, AC; Monteiro, B.M.; Minervino, Antônio Humberto Hamad

doi:10.1111/rda.13150

Cited by 17 publications

(20 citation statements)

References 15 publications

(36 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Oestrous synchronization resulted in a pregnancy rate of 52%. This is in agreement with previous studies that reported a pregnancy rate of 50% after synchronization (Bo, Baruselli, & Mapletoft, ), including a study conducted in the Amazon region (Pereira et al, ). However, lower pregnancy rates of 38.6% (Torres‐Júnior et al, ) and 41.9% (Sá Filho et al, ) have been reported.…”

Section: Discussionsupporting

confidence: 93%

“…The differences in the reported studies could be attributed to several different factors. For example, different progesterone sources used in the synchronization protocol (Patron et al, ), farm management and mineral supplementation (Minervino, Cardoso, & Ortolani, ), body condition scores of cows (Pereira et al, ) and control of reproductive diseases in the herd (El‐Tarabany & AL‐Marakby, ), which can all affect the pregnancy rates after TAI, making it difficult to compare across studies. Oestrous resynchronization reduces the service time and therefore increases the reproductive efficiency of the herd (Sá Filho et al, ).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of oestrous resynchronization on the reproductive efficiency of zebu cows

Faleiro

Neves

Pereira

et al. 2019

Reprod Domestic Animals

Self Cite

View full text Add to dashboard Cite

The aim of this study was to develop a resynchronization strategy before the return of oestrus in cows diagnosed as not pregnant after fixed‐time artificial insemination (TAI). A total of 839 cows, approximately 45 days post‐partum, were synchronized using TAI. On day 0, intravaginal progesterone‐releasing devices were inserted and 2 mg of oestradiol benzoate was administered. Eight days later (D8), the progesterone‐releasing devices were removed and oestradiol cypionate (0.5 mg, eCG [300 IU]) and prostaglandin (7.5 mg) were administered. All cows were inseminated between 48 and 56 hr after device removal (D10). Thirty days after TAI, cows that were not diagnosed as pregnant by ultrasound were immediately resynchronized and again inseminated at a fixed time. The hormonal protocol used in the first and second rounds of TAI was the same. The pregnancy rate after the first TAI was 52%, and after the second TAI, it was 49%. The increase in the total pregnancy rate (synchronization + second oestrous synchronization) compared to a single synchronization was 23.5%. In conclusion, resynchronization of oestrus and ovulation in zebu cows that had previously undergone TAI protocols is effective in increasing the reproductive efficiency.

show abstract

Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Effect of oestrous resynchronization on the reproductive efficiency of zebu cows

Faleiro

Neves

Pereira

et al. 2019

Reprod Domestic Animals

Self Cite

View full text Add to dashboard Cite

show abstract

“…Não foram observadas diferenças em relação ao número de usos do dispositivo intravaginal de P4 (p > 0,05). Esse resultado pode ser devido à quantidade efetiva de progesterona presente no CIDR®, no qual há 1,9 g de P4 por dispositivo (Pereira et al, 2018). A eficácia na utilização do dispositivo intravaginal de P4 por mais de uma vez também pode sofrer influências da concentração plasmática do hormônio endógeno presente nos animais.…”

Section: Resultsunclassified

Eficiência da inseminação artificial em tempo fixo em fêmeas zebuínas na mesorregião Sudeste do Pará, Brasil

Carvalho

Cavalcanti²,

Chaves

et al. 2019

RCA

View full text Add to dashboard Cite

Bos taurus indicus Eficiência reprodutiva Manejo reprodutivo Intervalo entre partos KEYWORDS Bos taurus indicus Reproductive efficiency Reproductive management Interval between deliveries RESUMO: A inseminação artificial em tempo fixo (IATF) é considerada uma biotecnologia reprodutiva capaz de promover o aumento dos índices reprodutivos, desempenhando efeito significativo sobre a eficiência bioeconômica da propriedade. Contudo, o sucesso da IATF é dependente de vários fatores que afetam diretamente a taxa de prenhez. Este trabalho tem como objetivo avaliar o efeito da IATF sobre a fertilidade de fêmeas Nelore da mesorregião Sudeste do Pará e verificar a influência de alguns fatores que podem comprometer a taxa de prenhez. Baseado em um estudo de campo, foram coletadas as informações das fichas de controle reprodutivo de 9.455 fêmeas Nelore pertencentes a nove fazendas e que foram submetidas ao mesmo protocolo de inseminação. As variáveis consideradas foram: fazenda, categoria animal, reutilização do dispositivo intravaginal de progesterona, escore da condição corporal, sêmen do touro e inseminador. A taxa de prenhez foi de 53,4% (5.052 de 9.455), havendo associação entre as fazendas (p < 0,05), com resultados que variaram de 46,8% a 63,1%. A categoria animal afetou a taxa de prenhez (p < 0,05) de nulíparas, primíparas e pluríparas (50,2, 47,2 e 56,0%, respectivamente). Não houve diferença (p > 0,05) quanto à reutilização do dispositivo intravaginal de progesterona de primeiro, segundo, terceiro e quarto uso, com as respectivas taxas de 54,3%, 53,1%, 53% e 51,2%. De acordo com o escore de condição corporal (p < 0,05), fêmeas de escore 3 e 3,25 apresentaram maiores taxas de prenhez, com 59,8% e 54,8%, respectivamente. Em relação à variável touro, 14 foram responsáveis por taxa de prenhez acima de 50%; três com resultados acima de 60% e um touro com 38,3% (p < 0,05). Houve diferença entre a taxa de prenhez e o inseminador (p < 0,05), obtendo resultados que variaram de 45,5% a 71,4%. As melhorias nos sistemas de manejo de cada fazenda poderão refletir de modo expressivo no aumento da taxa de prenhez dos rebanhos da região do Sudeste paraense.

show abstract

“…The positive effect of increasing energy and protein supply has been reported to improve the reproductive performance in mostly starved or underfed (low BCS) animals such as reported by Abdulkareem et al (2012) and Mithuna et al (2015). Pereira et al (2018) also reported that the conception rate (69.75%) found greater in cows with moderate BCS (between 2.75-4.0) than thin cows (32.98%) with low (BSC of 2.0-2.5). Otherwise, increased protein and energy supplies beyond requirements are negatively correlated with postpartum oestrus and ovulation (Qureshi et al, 2002).…”

Section: Post-partum Oestrus Interval and Services Permentioning

confidence: 87%

A Case Study of Bear Reintroduction in Pakistan: Art and Politics in Conservation

Fakhar-i-Abbas¹,

Mian²,

Raja³

et al. 2020

THE JAPS

View full text Add to dashboard Cite

Improved feeding during pre-calving phase affects the Body Condition Score (BCS) that subsequently dictate the postcalving productive and reproductive performance. The objective of this study was to investigate the effect of three levels of concentrate supplementation [0.5, 1.0 and 1.5% of body weight (BW)] during pre-calving period on post-calving reproductive and lactation performance in Nili Ravi buffalo heifers. Twenty-six pregnant Nili-Ravi buffalo heifers at 150 ± 20 [Mean ± standard deviation (SD)] days in pregnancy with (BW=516± 57 KG, BCS (1-5) =3.98± 0.18) were selected and divided into three treatment groups; Low (n=8), Medium (n=9) and High (n=9) and allocated three dietary treatments. The treatments were basal diets composed of green fodder [dry matter (DM) = 2.0% of body weight (BW)] with three levels of Concentrates (CP=20.9 %, ME= 2.62 Mcal/kg) i.e. 0.5 (Low), 1.0 (Medium), and 1.5% (High) of the BW. The animals received same feed (forage DM at the rate of 2% of BW and concentrate at 0.5 kg per liter of milk produced on as fed basis) after calving. Increasing concentrate supplies from 0.5 to 1.5% of BW increased pre-calving dry matter intake (DMI), however, it didn't affect BW and BCS at calving. Increased concentrate supply at 1.5% of BW resulted in decrease in post calving conception rate to 33% as compared to 75 and 77.8% at 0.5 and 1.0% of BW concentrate supply. The treatment High decreased lactation length (15%) and yield (17%) as compared to Low and Medium treatment. Pre-calving supplementation of concentrate beyond 0.5% of BW showed no improvement of postcalving productive and reproductive performance. In the given dietary situation, the Nili Ravi heifers didn't require more than 0.5% of BW concentrate along with 2.0% of BW green fodder DM during post 150 days of pregnancy.

show abstract

Effect of body condition score and reuse of progesterone‐releasing intravaginal devices on conception rate following timed artificial insemination in Nelore cows

Cited by 17 publications

References 15 publications

Effect of oestrous resynchronization on the reproductive efficiency of zebu cows

Effect of oestrous resynchronization on the reproductive efficiency of zebu cows

Eficiência da inseminação artificial em tempo fixo em fêmeas zebuínas na mesorregião Sudeste do Pará, Brasil

A Case Study of Bear Reintroduction in Pakistan: Art and Politics in Conservation

Contact Info

Product

Resources

About