Different circulating progesterone concentrations during synchronization of ovulation protocol did not affect ovarian follicular and pregnancy responses in seasonal anestrous buffalo cows

Carvalho, N. A. T.; Soares, J. G.; Souza, Diego Cavalcante de; Vannucci, Francesco; Amaral, Renato; Maio, José; Sales, J. N. S.; Filho, Manoel Francisco de Sá; Baruselli, Pietro Sampaio

doi:10.1016/j.theriogenology.2013.11.004

Cited by 26 publications

(29 citation statements)

References 44 publications

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“…Several reports compared the progesterone concentration achieved after insertion of new or once or more reused CIDR (Zuluaga and Williams, 2008;Long et al, 2009;Carvalho et al, 2014). 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).…”

Section: Introductionmentioning

confidence: 99%

“…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%

“…The residual progesterone amount in the previously used CIDR is affected by several factors including the initial progesterone concentration 1.38 Vs 1.9 g (Rathbone et al, 2002), the method of sterilization between the cycles (Zuluaga and Williams, 2008), the duration of the insertion period 7 Vs 9 days (Long et al, 2009;Carvalho et al, 2014), the number of the reusing cycles once Vs more cycles (Vilariño et al, 2011;Carvalho et al, 2014) and/or the conditions and the duration of the storage between the cycles. Except for , all previous studies reused the CIDR without storage (Nogueira et al, 2011), after storage for 48 h (Zuluaga and Williams, 2008), 7 days (Long et al 2009) or unrecorded period (Colazo et al, 2004;Carvalho et al, 2014). To our knowledge, no previous reports investigated the efficiency of the previously used CIDR after a prolonged storage.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Efficiency of Previously used CIDR Stored for a Prolonged Period

Abdallah¹,

Elrahim²

2014

Adv. Anim. Vet. Sci.

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“…In contrast, buffalo cows in seasonal anestrous synchronized with a conventional protocol consisting of 9 d of progesterone exposure along with an equine chorionic gonadotrophin (eCG) injection at CIDR removal achieved a P/AI of approximately 50% (CARVALHO et al, 2014). As observed, the fertility of TAI dairy buffaloes is variable and further studies are still required to confirm whether a short 5 d protocol could successfully replace the conventional 9 d protocol as a less expensive alternative.…”

Section: Treatment Controlmentioning

confidence: 92%

“…For instance, estradiol/progesterone-based protocols have been widely applied for timed artificial insemination (TAI) of buffalo cows in South America (CARVALHO et al, 2014). Responses to these protocols, however, are inconsistent in terms of fertility.…”

Section: Introductionmentioning

confidence: 99%

Use of a five-day progesterone-based timed artificial insemination protocol for dairy water buffaloes

Pfeifer¹,

Castro²

2017

SCA

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The objective of this study was to determine the effect of a short five-day (5 d) progesterone-based timed artificial insemination (TAI) protocol on the time of ovulation and fertility in dairy water buffaloes. In experiment 1, 30 dairy buffaloes were subjected to one of two estrous synchronization protocols. Females in the control group (n=17) were administered 2 mg of estradiol benzoate (EB), and an intravaginal progesterone-releasing device (CIDR) was inserted on day -12. On day -3, CIDR inserts were removed and all cows were treated with 150 μg of D-cloprostenol (a PGF2α-analogue). Fortyeight hours after CIDR removal, all cows received 100 µg of gonadotropin-releasing hormone (GnRH). Females assigned to the short 5 d group (n=13) received treatment similar to the control group, except that the CIDR device was inserted on day -8, and the EB treatment was eliminated. In experiment 2, 51 dairy buffaloes were separated into control (n=27) and short 5 d (n=24) groups that received the same treatment as described for cows in experiment 1, except that all females were inseminated 16 to 18 h after GnRH injection. The use of a short 5 d progesterone-based TAI protocol with or without treatment with EB on day 0 did not affect the time of ovulation and pregnancy per artificial insemination in lactating water buffaloes. Thus, we suggest that the short 5 d TAI protocol may be successfully used as an alternative to induce ovulation in dairy buffaloes, with the particular advantages of avoiding EB treatment and a shorter interval from the beginning of the protocol to TAI.

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