Resynchronization of previously timed-inseminated beef heifers with progestins

Colazo, M.G.; Kastelic, John P.; Jaime, R. C. M.; Gavaga, Q.A.; Whittaker, Pamela; Small, J. A.; Martı́nez, M.F.; Wilde, R.E.; Veira, D. M.; Mapletoft, R.J.

doi:10.1016/j.theriogenology.2005.06.001

Cited by 40 publications

(27 citation statements)

References 25 publications

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“…In the present study, PRs for the first eligible oestrus after CIDR removal were not different on day 30 which are in agreement with the results reported by Rivera et al (2005) and Colazo et al (2006) on day 30 in dairy and beef heifers and by El-Zarkouny and Stevenson (2004) on day 29 in dairy cows. On the other hand, PRs on day 55 post TAI in the present study were numerically higher (not significant) in CGPG group than in the control which are in agreement with the results of Hanlon et al (1997) who reported a similar PR to a resynchronised oestrus in dairy heifers using CIDR device for 5 days beginning 14 or 16 days after AI.…”

supporting

confidence: 93%

“…After CIDR removal, 58.1% of the heifers that failed to breed from TAI showed oestrus within 1.9 days and 77.4% within 2.4 days for CGPG group compared to 23.8% and 57.1% heifers, which showed oestrus within 2.9 and 6.7 days, respectively, for the control group. Similar observations were found in lactating dairy cows (Chenault et al, 2003;Alnimer and Lubbadeh, 2008), beef heifers (Colazo et al, 2006) and in dairy heifers (Van Cleeff et al, 1996;Hanlon et al, 1997;Rivera et al, 2005).…”

supporting

confidence: 73%

“…On the other hand, PRs on day 55 post TAI in the present study were numerically higher (not significant) in CGPG group than in the control which are in agreement with the results of Hanlon et al (1997) who reported a similar PR to a resynchronised oestrus in dairy heifers using CIDR device for 5 days beginning 14 or 16 days after AI. In addition, similar conception rates were found in CIDRtreated and control groups of beef heifers (Colazo et al, 2006). In contrast, Xu and Burton (1999) reported reduced PR in dairy heifers after resynchronisation with a CIDR device from day 16 to day 21 after first AI.…”

supporting

confidence: 55%

“…Meanwhile, mean interval between first and second AI was similar in treated and control dairy heifers (Van Cleeff et al, 1996;Stevenson et al, 2003). While, in beef heifers, mean interval from TAI to onset of oestrus was lower for CIDR-treated group than the control (Colazo et al, 2006). In addition, the number of services per conception (1.61) was better than that in previous studies for dairy cows in TAI where it was 1.7 with CIDR device and 1.78 without CIDR (Alnimer, 2005;Alnimer and Lubbadeh, 2008).…”

mentioning

confidence: 63%

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The effect of a progesterone (P4) intravaginal device (CIDR) on resynchronisation of oestrus and embryonic loss in previously timed inseminated dairy heifers

Alnimer

2009

Animal

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A study was done to evaluate the effect of using progesterone (P 4 ) intravaginal device (CIDR: controlled internal drug-releasing dispenser) to synchronise the return to oestrus of previously timed inseminated (TAI) dairy heifers, and to evaluate embryo survival and pregnancy rate (PR) in the return to oestrus heifers. At the onset of the artificial insemination (AI) breeding period (day 29), heifers were randomly assigned into two groups (treated group CGPG, n 5 79) and (control group GPG, n 5 83). Every heifer in both groups was injected with gonadotropin-releasing hormone (GnRH) agonist and prostaglandin F2-alpha (PGF 2a ) as follows: GnRH on day 29; PGF 2a on day 22; GnRH and TAI on day 0. Heifers in both groups received TAI within 30 min after the second GnRH injection. Artificial insemination at first breeding was conducted for all heifers during 55 days from day 0. On day 14 after timed insemination, every heifer in the CGPG group received CIDR device for 6 days. Within 3 days after CIDR removal, more heifers in CGPG group showed oestrus within 1.9 days compared to heifers that showed oestrus within 2.9 days in the control. Within 10 days after CIDR removal, more heifers in the CGPG group showed oestrus within 2.4 days compared to heifers that showed oestrus within 6.7 days in the control. PRs on days 30 and 55 were not different between both groups, while PR on day 55 during September were higher ( P 5 0.032) in CGPG group (58.0%) than GPG group (37.0%). In addition, PR from first to second AI was higher ( P 5 0.037) for CGPG group (79.8%) than for GPG group (65.1%) but it was similar after that. Pregnancy losses between days 30 and 55 tended to be lower ( P 5 0.089) for the CGPG group (12.7%) compared to 25.1% for the GPG group. Interval between first and second AI was lower ( P 5 0.052) for the CGPG group (27.5 6 1.6 days) compared to 31.6 6 1.3 days for heifers in the GPG group but no differences were detected for intervals from second to third AI and from third to fourth AI between the two groups. Number of services per pregnancy was not different between CGPG and GPG groups. Results indicate that the CIDR device improved synchronisation to return to oestrus and increased PR to first AI during high temperature months by reducing embryonic losses.

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supporting

confidence: 93%

supporting

confidence: 73%

supporting

confidence: 55%

mentioning

confidence: 63%

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The effect of a progesterone (P4) intravaginal device (CIDR) on resynchronisation of oestrus and embryonic loss in previously timed inseminated dairy heifers

Alnimer

2009

Animal

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“…Additionally, the efficiency of the estradiol-progestin based synchronization protocols after incorporating once or more reused CIDR had been investigated in bovine (Colazo et al, 2004;Colazo et al, 2006;Meneghetti et al, 2009;Carvalho et al, 2014) or small ruminant (Vilariño et al, 2011;Vilariño et al, 2013). To our knowledge the efficiency of GnRH based protocols after incorporating the previously used CIDR never been investigated.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Previously used CIDR Stored for a Prolonged Period

Abdallah¹,

Elrahim²

2014

Adv. Anim. Vet. Sci.

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| This study investigated the efficiency of the previously used controlled internal drug release (CIDR) stored for 30 days before reusing. In the first experiment, twenty seven Holstein cows at the day of estrus (day 0) received either no treatment (control), new or reused CIDR and blood samples were collected at day 0, 1, 3 and 7. At day 1 and 3, serum progesterone concentration in cows received new CIDR (1.417 and 1.616 ng/ml) was significantly higher than in cows received a reused one (0.545 and 0.954 ng/ml) which in turn was higher than the control group. In the second experiment, estrous cycle was synchronized using Ovsynch, New-CIDRsynch or Reused-CIDRsynch. Cows in Ovsynch (n=119) received GnRH on day 0 then PGF2α on day 7. Fifty six hours after the PGF2α cows received another dose from GnRH and inseminated 18 h latter. Cows in new-CIDRsynch (n=870) and reused-CIDRsynch (n=220) were treated in the same way with exception of inserting a new or reused CIDR between day 0 and day 7. Non returned cows were examined for pregnancy diagnosis at 30 and 70 days post-insemination. Pregnancy-30 and 70 rates after New-CIDRsynch (36.1% and 30.5%) and Reused-CIDRsynch (36.4% and 31.8%) tended to be higher than after Ovsynch (27.7% and 25.2%) (P= 0.07: 0.08). In conclusion, the previously used CIDR -stored for 30 days-have residual progesterone and incorporating new or reused CIDR into Ovsynch improved the efficiency of the protocol in a similar way.

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Selection and Management of the Embryo Recipient Herd for Embryo Transfer

Lamb

Mercadante

2014

Bovine Reproduction

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Resynchronization of previously timed-inseminated beef heifers with progestins

Cited by 40 publications

References 25 publications

The effect of a progesterone (P4) intravaginal device (CIDR) on resynchronisation of oestrus and embryonic loss in previously timed inseminated dairy heifers

The effect of a progesterone (P4) intravaginal device (CIDR) on resynchronisation of oestrus and embryonic loss in previously timed inseminated dairy heifers

Efficiency of Previously used CIDR Stored for a Prolonged Period

Selection and Management of the Embryo Recipient Herd for Embryo Transfer

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