Sheep Progesterone
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Effects of long-term controlled internal drug release reuse on reproductive performance, hormone profiles, and economic profit of sheep
ABSTRACT Fifty-seven multiparous Awassi ewes in the breeding season were used to compare the effects of controlled internal drug release (CIDR) reuse on hormone profiles, reproductive performance, and economic production. Ewes were randomly allotted to one of three CIDR treatments: new (control), once-used, and twice-used; treatment lasted 12 days. Blood sam
R. Bras. Zootec.. Publicado em: 28/11/2019
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2. Produção, composição do leite e desempenho reprodutivo de ovelhas Santa Inês alimentadas com rações contendo óleo de canola ou linhaça / Milk yield, milk composition and reproductive performance of Santa Inês ewes fed diets containing canola or linseed oil
The objective in this study was to evaluate the effect of the addition of canola oil (CO) or linseed oil (LO) on milk production and composition and reproductive performance of Santa Inês ewes. In the experiment I, 33 Santa Inês ewes were fed diets containing 50% of roughage (Cynodon dactylon hay). Experimental diets included a control (no oil) and two rem
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2012
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3. Protocolos de sincronização da ovulação para inseminação artificial com tempo fixo em ovelhas / Protocol synchronization of estrus and ovulation in sheep
The aim of study was to test the hormonal protocol for FTAI (fixed timed artificial insemination) with progesterone for 6 days applying eCG (Equine Corionic Gonadotrophin) or BE (Estradiol Benzoate) and induction of estrus using: MAP (acetato de medroxiprogesterone) for 6, 9 and 14 days or a single dose of PGF2a or male effect. Experiment 1: In D0 each ewe (
Publicado em: 2009
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4. Utilização do Eazi-Breed CIDR, novo e reutilizado, em protocolos longos e curtos para sincronização do estro e da ovulação em ovelhas / Use of Eazi-Breed CIDR new and re-used in long and short protocols for synchronization of estrus and ovulation in sheep.
Foram conduzidos dois experimentos para avaliar a utilização do Eazi-Breed CIDR novo e reutilizado em protocolos longos e curtos na sincronização do estro e da ovulação em ovelhas. No primeiro estudo avaliou-se o desempenho reprodutivo de ovelhas em programa de inseminação artificial em tempo fixo com protocolo curto (cinco dias) e longo (doze dias)
Publicado em: 2009
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5. Effects of growing rates in prepubertal period on performance, age at puberty and milk yield of Santa Ines sheep / Efeitos de diferentes taxas de crescimento na recria sobre o desempenho, idade a puberdade e produção leiteira em fêmeas da raça Santa Inês
Trial I: Sixty Santa Ines ewe lambs were used to evaluate the effects of three growing rates until 7 months of age. Treatments were defined to achieve high (HGR), moderate (MGR) and low (LGR) growing rates. The dry matter intake and average daily gain (ADG) were evaluated, well as serum levels of progesterone in order to detect the age of puberty. Linear eff
Publicado em: 2009
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6. EARLY LUTEAL FUNCTION IN EWES SUBMITTED OF PNEUMOPERITONEUM DURING ESTRUS / FUNÇÃO LUTEAL INICIAL EM OVELHAS SUBMETIDAS A PNEUMOPERITÔNIO DURANTE O ESTRO
Ewes submitted to artificial insemination by laparoscopy have an increase in serum cortisol levels. Pain induced by pneumoperitoneum appears to be the cause of such increase and may be related to the low conception rates of the technique. The objective of this study was to investigate progesterone levels in ewes following pneumoperitoneum during estrus. One
Publicado em: 2008
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7. Sincronização de estro com prostaglandina F2 versus progesterona associada à gonadotrofina coriônica eqüina (eCG) em ovelhas deslanadas no Distrito Federal
The aim of this study was to compare two protocols of estrus synchronization in Santa Inês ewes. Thirty-eight ewes were randomly divided into two groups and treated with two protocols of estrus synchronization: protocol PGF2a (two doses of 0.530 mg of PGF2a, nine days apart) and protocol P4+eCG (intravaginal sponge impregnated with medroxyprogesterone aceta
Publicado em: 2008
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8. Perfil analítico de estrógenos e progestinas em diferentes matrizes biológicas na espécie ovina (Ovis aires) / Analytic profile of estrogens and progestins in different biological matrixes in the ovine (Ovis aires)
The aim of the present work was evaluate the hormonal profiles of progestins and estrogens in blood, feces, urine and saliva during the induced estral cycle in ovine. Samples were collected daily a 60-day period from eight adult (n=8) cycling ewes. The animals were previously submitted to a protocol of estrus induction and synchronization for twelve days. In
Publicado em: 2007
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9. Comparative study of methods for extracting steroid hormones from feces of several animal species / Estudo comparativo de protocolos de extração de hormônios esteróides fecais em diferentes espécies de animais
Adlercreutz performed the first quantifications of steroid hormones in human feces in 1976. Since then, studies based on this technique have been applied to wildlife, domestic animals, and recently to laboratory animals. Several procedures for extracting fecal steroids were established and are available in the literature. It is possible to assess the efficie
Publicado em: 2006
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10. Conceptus signals for establishment and maintenance of pregnancy
Establishment and maintenance of pregnancy results from signaling by the conceptus (embryo/fetus and associated extraembryonic membranes) and requires progesterone produced by the corpus luteum (CL). In most mammals, hormones produced by the trophoblast maintain progesterone production by acting directly or indirectly to maintain the CL. In domestic animals
BioMed Central.
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11. Steroidal regulation of uterine resistance to bacterial infection in livestock
Postpartum uterine infections reduce reproductive efficiency and have significant animal welfare and economic consequences. Postpartum uterine infections are classified as nonspecific, but Arcanobacterium pyogenes and Escherichia coli are usually associated with them in cattle and sheep. Pyometra is the most common type of uterine infection in dairy cattle,
BioMed Central.
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12. Expression of Endogenous Betaretroviruses in the Ovine Uterus: Effects of Neonatal Age, Estrous Cycle, Pregnancy, and Progesterone
The ovine genome contains 15 to 20 copies of endogenous retroviruses (enJSRVs) highly related to the oncogenic jaagsiekte sheep retrovirus (JSRV) and enzootic nasal tumor virus. enJSRVs are highly expressed in the endometrial lumenal epithelia (LE) and glandular epithelia (GE) of the ovine uterus. The effects of neonatal age, estrous cycle, pregnancy, and pr
American Society for Microbiology.