Effect of biostimulation on uterine involution, early ovarian activity and first postpartum estrous cycle in beef cows

Landaeta-Hernández, Antonio; Giangreco, M.A.; Meléndez, P.; Bartolome, J.A.; Bennet, F; Rae, D. O.; Hernández, Jorge A.; Archbald, L.F.

doi:10.1016/j.theriogenology.2003.09.002

Cited by 25 publications

(14 citation statements)

References 47 publications

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“…Another strategy to stimulate an advancement of postpartum rebreeding is biostimulation (see review: Fiol and Ungerfeld, 2011). In many studies it has been reported that exposure to males stimulates cyclic activity in postpartum cows (Zalesky et al, 1984;Alberio et al, 1987;Landaeta-Hernández et al, 2004;Berardinelli and Joshi, 2005;Landaeta-Hernández et al, 2006). The introduction of bulls, or even androgenized steers stimulates an increase in LH pulse secretion in postpartum cows (Fernandez et al, 1996;Tauck et al, 2010) and anestrous heifers (Fiol and Ungerfeld, 2016).…”

Section: Introductionmentioning

confidence: 99%

Biostimulation in primiparous postpartum acyclic early weaned beef cows: introducing the bulls at weaning advances cyclic rebreeding

Ungerfeld¹

2018

Anim Reprod

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Weaning and biostimulation promote an early cyclic postpartum rebreeding. Although the signals and mechanisms by which weaning and biostimulation differ, both end stimulating LH secretion. The aim of the experiment was to determine if weaning and biostimulation have additive effects advancing the postpartum rebreeding in primiparous postpartum anoestrous cows. The experiment was performed during late spring -early summer with 51 primiparous Hereford cows. Six weeks after parturition calves were weaned, and cows were managed in two experimental groups: WB (n = 22) and WDB (n = 29). Bulls were joined with WB cows at weaning, but joining was delayed one week in WDB cows. The presence of corpora lutea in the ovaries was recorded weekly with ultrasound, and 28 and 50 days after the end of the exposure period, pregnancy was determined by ultrasound. The percentage of cyclic cows was greater in WB than in WDB on Weeks 8 (36.4 vs 0 %), 9 68.2 vs 13.8 %), 10 (86.4 vs 27.6 %) and 11 (100.0 vs 37.9 %) (P < 0.001 in all). Cows that were weaned and biostimulated simultaneously rebred earlier than WDB cows (Week 9.1 ± 0.2 vs Week 11.0 ± 0.2; P < 0.0001). At the end of the experiment 46/51 (90.2%) of the animals were cycling. Pregnancy rate tended to be greater in WB than WDB cows 28 days after the end of the breeding period 18/22 vs 17/29, P = 0.077), but there was no difference at the end of the study (20/22 vs 24/29, ns). In conclusion, the application of weaning and biostimulation simultaneously advances postpartum rebreeding more than weaning alone in beef cows.

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Section: Introductionmentioning

confidence: 99%

Biostimulation in primiparous postpartum acyclic early weaned beef cows: introducing the bulls at weaning advances cyclic rebreeding

Ungerfeld¹

2018

Anim Reprod

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“…Bull exposure at the time of AI had no significant effect on the P4 secretion in the same cycle. Marginal and insignificant increase in P4 concentrations after bull exposure has been reported in the early post‐partum period (Landaeta‐Hernández et al. 2004).…”

Section: Discussionmentioning

confidence: 99%

Effect of Acute Bull Exposure Around the Time of Artificial Insemination on Serum Oxytocin and Progesterone Concentrations and Pregnancy Rates in Dairy Cows

Ababneh

Obeidat

Husein

et al. 2012

Reprod Domestic Animals

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This study examined the effect of acute bull exposure around the time of artificial insemination (AI) on oxytocin and progesterone concentrations, and pregnancy rates in dairy cows. Ninety six dairy cows, stratified according to parity into primiparous and pluriparous, were divided into three groups; short bull exposure (SBE; 10 min, n = 32), long bull exposure (LBE; 4 h, n = 32) or no bull exposure (NBE; n = 32). On day 45 post-partum, all cows were treated with PGF2α on three occasions 11-14 days apart to synchronize oestrus. They were submitted to fixed time AI 80 h after the third PGF2α injection. Cows in the SBE and LBE groups were artificially inseminated 5 min after the introduction of the bull. From a subset of cows (n = 6 per group; three primiparous and three pluriparous), blood samples were collected once every 5 min starting 15 min before AI until 15 min after AI and analysed for oxytocin concentrations. Additional blood samples were collected for measurements of progesterone (P4) concentrations once daily for 4 days starting on the day of AI and once every 3 days thereafter until day 22. The effects of bull exposure, time, parity, difficulty of AI, and pregnancy on oxytocin and P4 concentrations were analysed using the mixed linear model procedure. Mean oxytocin concentrations or change in oxytocin concentrations after bull exposure or AI were not different among groups. Pregnancy rates for the NBE, SBE and LBE groups were 55.5%, 33.3% and 44.4%, respectively, and were not different among groups. In conclusion, acute bull exposure around the time of AI did not affect oxytocin and progesterone concentrations and did not improve pregnancy rates in dairy cattle under these farms conditions.

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“…Therefore, effort to reduce this problem is necessary. The duration of anestrus in cattle was usually shortened when cows exposed to bulls (Rekwot et al, 2000;Landaeta-Hernández et al, 2004;Miller & Ungerfeld, 2008). Likewise, regular examination of postpartum cows in order to achieve shortening the duration between calving and first estrus seems to be one of solving the problems (Yusuf et al, 2012a).…”

Section: Reproductive Management Of Bali Cowsmentioning

confidence: 99%

Current Status of Reproductive Management in Bali Cows in South Sulawesi Province, Indonesia

Baco¹,

Yusuf²,

Wello³

et al. 2013

OJF

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The objective of this study was to elucidate the current status of reproductive management of Bali beef cows in south Sulawesi Province, Indonesia. This study was conducted in Bantaeng Regency, South Sulawesi Province, Indonesia. Purposive sampling was used to choose the location where the study was taking place with consideration that this region has potential place for Bali cows. Data collection both primary and secondary data was done through observation and interview to obtain both quantitative and qualitative data. The results of this study showed that reproductive management applied to Bali cows in this region was very low. However, knowledge of the farmers regarding reproductive management such as estrus and its signs were much better, although the time of insemination to the estrous cows sometimes was too late. Mating system of Bali cows in this area were two different methods; natural mating and artificial insemination (AI). To adopt AI technology, the farmers should follow the standard operation of this technology. This study also showed that most of the farmers had good knowledge about estrus synchronization; however, they are still having difficulty to obtain or to access this technology, especially the price of the hormones used for estrus synchronization.

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Effect of biostimulation on uterine involution, early ovarian activity and first postpartum estrous cycle in beef cows

Cited by 25 publications

References 47 publications

Biostimulation in primiparous postpartum acyclic early weaned beef cows: introducing the bulls at weaning advances cyclic rebreeding

Biostimulation in primiparous postpartum acyclic early weaned beef cows: introducing the bulls at weaning advances cyclic rebreeding

Effect of Acute Bull Exposure Around the Time of Artificial Insemination on Serum Oxytocin and Progesterone Concentrations and Pregnancy Rates in Dairy Cows

Current Status of Reproductive Management in Bali Cows in South Sulawesi Province, Indonesia

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