Evaluation of pregnancy rates of Bos indicus cows subjected to different synchronization ovulation protocols using injectable progesterone or an intravaginal device

Campos, Jefferson Tadeu; Morotti, Fábio; Costa, Ciniro; Bergamo, Larissa Zamparone; Seneda, Marcelo Marcondes

doi:10.5433/1679-0359.2016v37n6p4149

Cited by 6 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Recently, it was found that cows synchronized with the conventional protocol TAI (Control/CIDR) had a higher (P < 0.05) pregnancy rate (60%) than those synchronized with P4 injectable/TAI 36 hours (33.3%). However, the group receiving injectable P4/TAI 48 hours had a similar (P > 0.05) pregnancy rate (48.9%) to those treated with either the conventional protocol ( Campos et al ., 2016b ).…”

Section: Discussionmentioning

confidence: 82%

“…The use of injectable P4 for TAI has provided lower pregnancy rates in comparison to protocols with P4 devices ( Morotti et al ., 2013b ; Campos et al ., 2016b ). However, several positive aspects of injectable P4 have been encouraging new experiments.…”

Section: Introductionmentioning

confidence: 99%

“…However, several positive aspects of injectable P4 have been encouraging new experiments. For example, injectable P4 has been related to low cost of handling, easy management of animals, hygienic benefits and no discard of devices ( Morotti et al ., 2013a ; Morotti et al ., 2013b ; Campos et al ., 2016a ; Campos et al ., 2016b ).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Injectable progesterone in timed artificial insemination programs in beef cows

Morotti¹,

Campos²,

Lunardelli³

et al. 2017

Anim Reprod

Self Cite

View full text Add to dashboard Cite

The aims of this study were I) to compare the follicular diameter, corpus luteum diameter and serum progesterone (P4) concentrations in cows treated with conventional protocol vs. injectable P4 protocol; II) to determine the serum P4 profile in ovariectomized heifers; and III) to compare pregnancy rate between protocols. In experiment I, multiparous cows received a protocol for ovulation synchronization with an intravaginal P4 device (n = 38; device + EB day 0; device removal + PGF2α + eCG + EC day 8) or injectable P4 (n = 38; injection + EB day 0; PGF2α + eCG + EC day 8). In experiment II, ovariectomized heifers (n = 8) were treated with injectable P4 and blood samples were collected to determine the serum P4 profile. In experiment III, multiparous cows were timed AI with two different P4 approaches, intravaginal P4 device (n = 48) or injectable P4 (n = 47). In the first experiment, cows treated with P4 device had higher (P < 0.05) diameter of dominant follicle after ovulation induction (11.6 ± 1.8 vs.10.3 ± 1.8 mm) and ovulation rate (97%, 37/38 vs. 47.3%, 18/38) than cows treated with injectable P4. But, the follicular growth daily was higher (P < 0.05) in cows treated with injectable P4 than intravaginal device (1.3 ± 0.4 vs. 1.0 ± 0.3 mm/day, respectively). In experiment II, the P4 concentration peak occurred within 48 hours (6.54 ng/mL) and decreased after 96 hours (P < 0.05) after P4 injection. In experiment III, cows with P4 device had higher (P < 0.05) pregnancy rate than the injectable P4 group (60.4 vs. 34.0%, respectively). These results demonstrate that although the intravaginal P4 devices showed a higher pregnancy rate, a protocol with injectable P4 represents an easier method and a promising alternative for TAI in cattle.

show abstract

Section: Discussionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Injectable progesterone in timed artificial insemination programs in beef cows

Morotti¹,

Campos²,

Lunardelli³

et al. 2017

Anim Reprod

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, in both cows and heifers, the reuse of P4 devices have shown varied results depending on the breed, individual response, nutritional status, diet, and adopted hormonal combination (Pinto, Silva, Mota, & Alberton, 2009). Conversely, the use of injectable P4 in synchronization protocols has been related to low cost, easy management of animals, and hygienic benefits (Morotti, Campos, Oliveira, & Seneda, 2013a;Morotti, Campos, & Seneda, 2013b;Campos, Morotti, Bergamo, Costa, & Seneda, 2016a;Campos, Morotti, Costa, Bergamo, & Seneda, 2016b). For TAI programs, these benefits provide a reduction in the risk of health problems associated with intravaginal devices, such as loss of the device and the occurrence of vaginitis and vulvovaginitis (Morotti et al, 2013a(Morotti et al, ,b, 2018.…”

Section: Introductionmentioning

confidence: 99%

Induction of puberty in Bos indicus heifers in the western Amazon region

Gonzalez

Assunção

Duarte

et al. 2020

Semina: Ciênc. Agrár.

Self Cite

View full text Add to dashboard Cite

The objective of this study was to evaluate the efficiency and cost of two distinct hormonal protocols for induction of puberty in Bos indicus heifers in the western Amazon region. Nelore prepubertal heifers (n = 127) aged 20 to 24 months (21 ± 0.3 months) and weighing 300 to 340 kg (318 ± 7 kg) were submitted to two distinct protocols for induction of cyclicity. Females were previously submitted to two ovarian ultrasound examinations (12-day interval) to verify the absence of the corpus luteum (CL). Then, the heifers were divided into two experimental groups: G-CIDR/EC (n = 54) and G-P4/EC (n = 73). The G-CIDR/EC group utilized a CIDR® for 12 days and on the day of its withdrawal, 0.6 mg of estradiol cypionate (IM) was administered. The G-P4/EC group received 150 mg of injectable progesterone (IM) and one injection of 0.6 mg EC 12 days after the progesterone injection. Twelve days after the end of the hormonal protocols, the heifers were submitted to another ultrasound evaluation for identification of cyclicity (ovulatory follicle or CL). These females were then submitted to a conventional protocol of synchronization of ovulation for timed artificial insemination (TAI). Only heifers responsive to puberty induction (G-CIDR/EC (n=30) and G-P4/EC (n=51)) were included in the TAI protocol. After seven days of insemination, both groups were exposed to natural breeding. In addition, an economic analysis was performed to evaluate cyclicity induction, the TAI protocol, and pregnancy in both groups. The G-CIDR/EC group showed 81.48% (44/54) of females responsive to induction of cyclicity (presence of CL) while the G-P4/EC group obtained 86.3% (63/73; p=0.463). Regarding the conception rate to TAI and to bull (natural breeding), the G-CIDR/EC group displayed 43.33% (13/30) and 33.33% (10/30), respectively, and the G-P4/EC group exhibited 54.9% (28/51) and 39.22% (20/51), respectively. The overall pregnancy rate (TAI+Bull) was 76.67% (23/30) in the G-CIDR/EC group compared to 94.12% (48/51; P=0.023) in the G-P4/EC group. The cost of the hormonal protocol to cyclicity induction resulted in an economy of 42.8% for injectable P4 compared to the intravaginal P4 group. In addition, the final cost of cyclic induction associated with TAI was 34% lower in the G-P4/EC group compared to the G-CIDR/EC group. We concluded that both cycling induction protocols were efficient in Bos indicus heifers from the western Amazon. However, injectable P4 provided a higher conception rate and lower pregnancy cost at the end of the reproductive season.

show abstract

“…No entanto, a ação da P4 injetável ainda não está totalmente elucidada. Ainda assim, estudos tem demonstrado taxas de prenhez similares com protocolo utilizando P4 injetável e implante intravaginal (CAMPOS et al, 2016).…”

Section: Protocolos a Base De Estradiol E Progesteronaunclassified

>b<Fertilidade de touros e suas interações com fatores relacionados as fêmeas em programas de inseminação artificial em tempo fixo>/b<

Galvão¹

View full text Add to dashboard Cite

Agradeço o apoio dos meus pais, os quais sempre fizeram o possível e o impossível para me incentivar e me dar a chance de ter oportunidades, independente do desafio sempre acreditaram em mim. Tenho certeza que sempre será assim, Ricardo e Eliane são a minha base e sempre terão a minha admiração. Agradeço também as pessoas mais importantes na minha jornada profissional: Adnan, Pedro e Manoel. Seria pouco eu descrever aqui a dimensão que vocês se tornaram para mim, o espelho de profissional e ser humano que eu levo de vocês. Eu me lembro até hoje o brilho da discussão entre vocês, do quanto aquilo me motivava a querer aprender e a buscar. Vocês acreditaram em mim, me apoiaram, me ajudaram, me incentivaram, foram mais do que colegas de trabalho! Vocês sempre serão o meu DREAM TEAM. Peço desculpas pelas poucas palavras, mas sinceramente não tem gratidão maior que a minha por vocês. Ao Manoel, que além de gestor e orientador se tornou mais do que um amigo. Agradeço por crescer com você, agradeço por me fazer enxergar o valor da família e do trabalho. Você é motivo de admiração e orgulho, sou sua fã! A minha filha, Giovanna, o sentindo da minha vida. Tenho certeza que Deus a preparou para esse momento, para me ajudar a enfrentar e superar momentos difíceis. Veio para me mostrar que o fardo não é maior do que aquele que podemos carregar e que essa conquista é inteiramente por ela e para ela. RESUMO GALVÃO, ALCO. Fertilidade de touros e suas interações com fatores relacionados as fêmeas em programas de inseminação artificial em tempo fixo. 2021. 92 f. Dissertação (Mestrado

show abstract

Evaluation of pregnancy rates of Bos indicus cows subjected to different synchronization ovulation protocols using injectable progesterone or an intravaginal device

Cited by 6 publications

References 9 publications

Injectable progesterone in timed artificial insemination programs in beef cows

Injectable progesterone in timed artificial insemination programs in beef cows

Induction of puberty in Bos indicus heifers in the western Amazon region

>b<Fertilidade de touros e suas interações com fatores relacionados as fêmeas em programas de inseminação artificial em tempo fixo>/b<

Contact Info

Product

Resources

About