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Showing 1 to 20 of 33 for “"CIDR"”.
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Evaluation of long-term CIDR-based estrus synchronization protocols in primiparous two-year-old beef cows
… Short-term controlled internal drug release (CIDR)-based protocols are currently the preferred method to synchronize estrus prior to FTAI in postpartum beef cows. Alternatively, long-term CIDR-based protocols have been used with greater success in beef heifers. Two experiments were designed to …
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The effects of varying the interval from follicular wave emergence to progestin withdrawal on follicular dynamics and the synchrony of estrus in beef cattle
… (P4), controlled internal drug-releasing device (CIDR) treatment duration, and PG or saline treatment as main effects. Cycling, Angus cows (n=49), on d 6 to 8 of the estrous cycle, were randomly assigned to receive a CIDR treatment for 7 or 9 d. Approximately half of the cows from each CIDR group …
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Synchronization and Resynchronization of Ovulation and Timed Insemination in Lactating Dairy Cows and Heifers
… of intravaginal progesterone (P4) inserts (CIDR) in synchronization protocols combined with timed artificial insemination (TAI) as related reproductive performance. In the first study, heifers were synchronized with CIDR inserts followed by TAI. Heifers in the estradiol cypionate (ECP) group …
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The effects of resynchronization of estrus using the 5 d CO-Synch + CIDR system in beef heifers
… after synchronization using a 5d CO-Synch + CIDR system. Estrus was synchronized in crossbred heifers (n=176) using 5 d CO-Synch + CIDR with FTAI at 72 h. After the initial AI, open heifers received either resynchronization (RS) or natural service (NS) return service treatments. The RS …
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Evaluation of the 5-day vs. 7-day Co-Synch + CIDR protocol in dairy heifers using timed AI.
… and insertion of previously used autoclaved CIDR on d 7 followed by 100 µg of GnRH administered on d 5, and a 25 mg PGF2α injection at CIDR removal (7D) on d 0; 2) 100 µg of GnRH and insertion of previously used autoclaved CIDR on d 5 and 25 mg of PGF2α injection at CIDR removal (5D) on d 0. …
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Effect of Timing of Insemination and Synchronization of Estrus Method on Artificial Insemination (AI) Pregnancy Rates in Beef Heifers
… plus prostaglandin (PG) or progesterone insert (CIDR) plus PG on AI pregnancy rate in beef heifers (n = 662) during Fall or Spring. Fall heifers (n = 349) received MGA-PG (MGA for 14 d followed by PG on d 18) or CIDR-PG (CIDR for 7 d, PG administered 1 d before CIDR removal). Estrus was monitored …
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Determinación de la efectividad de la progesterona exógena (CIDR) en la tasa de retención embrionaria, en hembras bovinas receptoras
… evaluar el efecto del dispositivo intravaginal (CIDR) como progesterona exógena en la tasa de retención embrionaria. Las hembras receptoras fueron seleccionadas de acuerdo a los siguientes criterios: Hembras cíclicamente sanas, que no hayan presentado parto distócico, que poseían buena habilidad …
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Effect Of A Cidr Insert And Flunixin Meglumine Administered At The Time Of Embryo Transfer On Pregnancy Rate And Resynchronization Of Estrus In Beef Cattle
… an intravaginal progesterone-releasing device (CIDR) at the time of ET on pregnancy rates (PR) and the resynchronization of estrus. Beef cows (n = 796) and heifers (n = 108) at three locations were assigned randomly within age to one of four groups in a 2 x 2 factorial arrangement of treatments …
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Changes in vaginal microbiome of beef cows enrolled in estrous synchronization protocols and its relation to fertility
… of a controlled internal drug release device (CIDR) improves cycle induction when compared to oral administration of P4. Vaginitis has been reported as a side effect to CIDR use in cattle, which raises concerns about its downstream effects on fertility. More specifically, the effects of CIDR …
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Progestin regulation of follicular dynamics in beef cattle
… (MGA) and Controlled Internal Drug Release (CIDR), can inhibit ovulation and synchronize estrus in cattle. However, long-term MGA treatment, in the absence of a corpus luteum, results in the formation of a persistent follicle (PF). Fertilization of a oocyte ovulated from a PF is associated …
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Divide and recombine: Autoregressive models and STL+
… methods are proposed and applied to the Akamai CIDR time series data. The Akamai network is one of the world's largest distributed-computing platforms, with more than 250,000 servers in more than 80 countries. It is responsible for 15-20 percent of all web traffic. We obtained 110 GB raw CIDR …
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Design, development and optimisation of veterinary intravaginal controlled release drug delivery systems
… have made in response to the new knowledge. The CIDR®1900 Cattle insert is a commercially available silicone based intravaginal delivery system containing the natural steroid progesterone for fertility regulation in cattle. It was designed in 1987 to be inserted for 12 days. Advances made in …
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Evaluation of the 7 and 7 synch protocol for control of the estrous cycle among beef cows prior to fixed-time artificial insemination with sex-sorted or conventional semen
… CO-Synch + controlled internal drug release (CIDR[copyright]) protocols prior to fixed-time artificial insemination (FTAI) of beef cows with conventional or sex-sorted semen. Cows (n = 1,538) were blocked based on age and days postpartum (DPP) and randomly assigned to protocol and semen type. …
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Fertility after timed artific[i]al insemination in response to a Controlled Internal Drug Release (CIDR) insert in lactating dairy cows
… insert (controlled internal drug release; CIDR) in conjunction with an ovulation-synchronization protocol. Cows were enrolled in a Presynch + Ovsynch protocol after parturition, where they received 2 injections of PGF[subscript]2[alpha], 14 d apart (Presynch) beginning between 30 and 36 …
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Comparison of controlled internal drug release (CIDR)-based protocols to synchronize estrus and facilitate artificial insemination (AI) in postpartum beef cows
… estrus. The 7-d Select Synch and CO-Synch + CIDR protocols provide an efficient and effective means to synchronize estrus in postpartum beef cows. Recently a 5-d Select Synch and CO-Synch + CIDR protocol was developed. To date, however, the literature is devoid of information comparing the …
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Tragedy of the routing table : an analysis of collective action amongst Internet network operators
… an effort launched in the 1990s called the CIDR Report attempts to incentivize route aggregation using social forces and norms in the Internet operator community. This thesis analyzes the behavior of Internet network operators in response to the CIDR Report from 1997 to 2011 to determine …
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Sincronización hormonal del estro en cabras criollas, bajo condiciones semi-intensivas de trópico seco en Nicaragua
… cada uno. Tratamiento 1 :EAZI-BREED ® -CIDR ® vía intravaginal, conteniendo 300 mg (0.3 g) de progesterona sintética (que liberó 20 mg d -1 aproximadamente) + ECP (Cipionato de Estradiol) a razón de 2.5ml, vía intramuscular (3 mg/ml) al noveno día (después de retirar el CIDR ® ), se …
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Increasing estrus expression in lactating dairy cows
… 1) CL only; 2) no CL + progesterone insert (CIDR); or 3) CL + 2 CIDR to achieve different concentrations of progesterone. Progesterone concentration 24 through 120 h post-treatment was greatest (P < 0.01) in CL + 2 CIDR, followed by CL, and no CL + CIDR cows. Estrus occurred 11 to 12 h …
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The Interaction of Sire Fertility and Timing of AI in a Synchronization Protocol
… was conducted to determine the effectiveness of CIDR inserts to allow for resynchronization of estrus in cows that did not conceive or maintain the conceptus at FTAI. Lactating Holstein cows (n = 1,457) from two well-managed dairy herds located in the piedmont region of North Carolina were …
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Efectividad de la reutilizacion del CIDR (Dispositivo Intravaginal Liberador de Progesterona) en la induccion del celo y la ovulacion en vacas con anestro post-parto
… efectividad de la reutilización del dispositivo CIDR (Dispositivo Intravaginal Liberador de Progesterona) bajo un método modificado de aplicación que incluyó el uso de GnRH y PGF2a,sobre la inducción del celo y ovulación en vacas en anestro postparto. Las variables evaluadas fueron: La …
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