Follicular Wave
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Strategies to increment in vivo and in vitro embryo production and transfer in cattle
Abstract Knowledge of follicular wave dynamics obtained through the use of real-time ultrasonography and the development of the means by which follicular wave dynamics can be controlled have provided practical approaches for the in vivo and in vitro production and transfer of embryos in cattle. The elective control of follicular wave emergence and ovulation
Anim. Reprod.. Publicado em: 28/11/2019
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2. Effect of follicular wave synchronization on superovulatory response of Girolando embryo donors
The objective of this study was to evaluate the effect of the follicular wave synchronization method on the superovulatory response of Girolando embryo donors. Seven cows and five heifers were divided into three treatments according to the method of the follicular wave synchronization prior to superovulation. The donors were superovulated with eight FSH decr
R. Bras. Zootec.. Publicado em: 2014-11
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3. Reproductive parameters of Sindhi cows (Bos taurus indicus) treated with two ovulation synchronization protocols
The objective of this study was to evaluate the reproductive parameters of Sindhi cows aiming to improve the efficiency of fixed-time artificial insemination protocols in this breed. For this purpose, sixteen Sindhi cows were divided into two groups: in group I (EB, n = 8) animals received an intravaginal P4 implant and an application of 2 mg of estradiol be
R. Bras. Zootec.. Publicado em: 2013-06
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4. Plasma urea nitrogen and progesterone concentrations and follicular dynamics in ewes fed proteins of different degradability
The effects of overfeeding with protein of different degradability on body condition, plasma urea nitrogen and progesterone concentrations, ovulation number and follicular dynamics were assessed in Santa Ines ewes. Twelve ewes were assigned to a randomized block design according to body weight and received overfeeding with soybean meal or with corn gluten me
Revista Brasileira de Zootecnia. Publicado em: 2012-07
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5. Ovarian response of Suffolk ewes to estrous synchronization using short-term protocol
The efficacy of estrus synchronization using short-term protocol was evaluated by ultrasound exams in Suffolk ewes during the pre-breeding season. The control Group (n = 12) was synchronized by treatment for 12 days with vaginal sponges impregnated with medroxyprogesterone acetate, and 400 IU eCG at sponge withdrawal. Experimental groups I, II and III kept t
Revista Brasileira de Zootecnia. Publicado em: 2012-02
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6. Protocolos hormonais de preparação de doadoras bovinas para produção de embriões in vitro / Different protocols to bovine donor preparation for in vitro embryo production
Efficiency of in vitro bovine embryo production has been affected by low quantity and quality of recovered oocytes from ultrasound-guided follicular aspiration (OPU). The objective of this study was to evaluate the effect of different synchronization of follicular wave protocols in the production of oocytes and embryos in vitro, of Bos taurus taurus and Bos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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7. Different protocols to bovine donor preparation for in vitro embryo production / Protocolos hormonais de preparação de doadoras bovinas para produção de embriões in vitro
Efficiency of in vitro bovine embryo production has been affected by low quantity and quality of recovered oocytes from ultrasound-guided follicular aspiration (OPU). The objective of this study was to evaluate the effect of different synchronization of follicular wave protocols in the production of oocytes and embryos in vitro, of Bos taurus taurus and Bos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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8. Effect of urea in the diet on ovarian follicular dynamics and plasma progesterone concentration in Alpine goats
To evaluate the effect of using urea in the diet on ovarian follicular dynamics and plasma urea and progesterone concentration, an experiment was carried out with 29 Alpine goats randomly distributed into four diets, each one containing 0%; 0.73%; 1.46% or 2.24% of urea on total dry matter. The follicular dynamics was monitored daily by ultrasonography. The
Revista Brasileira de Zootecnia. Publicado em: 2011-07
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9. Dinâmica folicular de vacas de corte tratadas com três protocolos de sincronização da ovulação =Ovarian follicular dynamics in beef cows treated with three protocols of synchronization of ovulation / Ovarian follicular dynamics in beef cows treated with three protocols of synchronization of ovulation
Background: Artificial insemination is an established and viable technique to accelerate the genetic advancement and economic return of the cattle. However, compromises the efficiency of detection of estrus results in low insemination rates. To avoid these problems in beef herd, synchronization protocols have been developed that allow inseminate large number
Publicado em: 2011
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10. Estudo da dinâmica folicular no protocolo de nove dias de sincronização de cios com o uso de um novo dispositivo de liberação sustentada de progesterona, associado ou não ao eCG, em ovelhas Santa Inês / Study of follicular dynamics during nine day estrus synchronization protocol using a new progesterone sustained release device, associated or not with eCG, in Santa Inês ewes
The present study aimed the assessment of follicular dynamics in Santa Inês ewes during the nine day estrus synchronization protocol, with or without the administration of eCG, using a new intravaginal silicon device, Primer-PR® (Tecnopec Brasil). In Experiment 1, ten ewes received the vaginal device on D0, which was removed on D9 and received 0,4mL of d-c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/03/2010
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11. Indução de codominância e dupla ovulação e novas abordagens em luteólise de bovinos / Induced codominance and double ovulation and new approaches on luteolysis in cattle
The day-4 ablation model for increasing the incidence of double ovulations in heifers was used for the chapters 2 and 3. In this regard, follicles ≥ 5 mm were ablated at 4 d post-ovulation to induce a prominent FSH surge and a new follicular wave, and two injections of prostaglandin F2α (12 h apart) were given two days later (6 d) to favor ovulati
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
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12. ESTERÓIDES NO CONTROLE DA REGRESSÃO DE FOLÍCULOS DE DIFERENTES DIÂMETROS PARA USO EM SISTEMAS DE INSEMINAÇÃO ARTIFICIAL EM TEMPO FIXO DE VACAS DE CORTE NO PÓS-PARTO / STEROIDS CONTROLLING THE REGRESSION OF FOLLICLES WITH DIFFERENT DIAMETERS FOR USE IN FIXED TIME ARTIFICIAL INSEMINATION SYSTEMS OF POST PARTUM BEEF COWS
Progestin associated to estradiol benzoate (EB) became the most used treatment for estrous induction in beef cow. However, those programs that use this association still can be enhanced to produce better pregnancy rates and easily the management. Two experiments were designed with this aim. In the first, it was investigated if progestin-estradiol association
Publicado em: 2007