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Annual characteristics of estrous activity in wool and hair ewe lambs under subtropical conditions Scientia Agricola
Rodrigues,Paula de Almeida; Coelho,Lia de Alencar; Nonaka,Keico Okino; Sasa,Aya; Vicente,Wilter Ricardo Russiano; Balieiro,Júlio César de Carvalho; Siqueira,Edson Ramos de.
The increased emphasis placed on lamb production in Brazil points to the need for a better knowledge of the annual pattern of reproductive activity in ewe lambs. This study evaluates the annual estrous activity pattern of hair and wool ewe lambs raised in southeast Brazil. Estrous characteristics were recorded for 12 months in ten Santa Inês and 21 Romney Marsh and Suffolk ewe lambs. Santa Inês ewe lambs exhibited a greater length of the normal estrous cycle (14 to 19 days) than Romney Marsh and Suffolk ewe lambs (17.0 ± 0.1 days vs. 16.5 ± 0.2 and 15.9 ± 0.2 days). All the ewe lambs presented a greater number of periods of estrus per animal per month for single estrous cycles (up to 26 days) during autumn and winter. During spring and summer there was a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Breeds; Estrous cycle; Sheep; Subtropics; Seasonality.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000500003
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Desempenho reprodutivo de cabras Alpinas tratadas com hCG cinco dias após o acasalamento. Repositório Alice
FONSECA, J. F. da; TORRES, C. A. A.; MAFFILI, V. V.; BORGES, A. M.; ESPESCHIT, C. J. B.; BALBINOT, P. de Z.; OLIVEIRA, R. F. M.; LEITE, P. A. G..
Objetivou-se com este estudo avaliar o efeito da administração de hCG sobre o desempenho reprodutivo de cabras Alpinas i durante a estação de acasalamento natural. Trinta e duas fêmeas nulíparas e 124lactantes, após a identificação de estro e acasalamento, foram aleatoriamente divididas, de acordo com a categoria, em dois tratamentos. Em TI (n=75) e T2 (n=81), os animais receberam I roL de solução salina ou 250 UI de hCG, respectivamente, por via intramuscular cinco dias após o acasalamento. A gestação foi verificada por ultra-sonografia transabdominal (probe de 3,5 MHz) nos dias 35 e 70 após o acasalamento, para detecção e confirmação da gestação, respectivamente. As taxas de gestação não diferiram entre TI (86,7%) e T2 (70,6%) para nulíparas e TI (78,3...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Caprino; Raça Alpina; Reprodução animal; Desempenho reprodutivo; Eficiência reprodutiva; Acasalamento; HCG; Dairy Goat; Reproductive performance; Corpus luteum; Progesterone; Pregnancy rate; Estrous cycle.
Ano: 2005 URL: http://www.alice.cnptia.embrapa.br/handle/doc/531515
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Effect of Ethanol Extract of Whole Plant of Trichosanthes cucumerina var. cucumerina L. on Gonadotropins, Ovarian Follicular Kinetics and Estrous Cycle for Screening of Antifertility Activity in Albino Rats International Journal of Morphology
Kage,Devendra N; Malashetty,Vijaykumar B; Seetharam,Y. N; Suresh,P; Patil,Saraswati B.
Ethanol extract of whole plant of Trichosanthes cucumerina L. var. cucumerina was evaluated for antiovulatory activity in adult rats. The ethanol extract at the doses 200 and 400mg/kg body weight (orally) affected the normal estrous cycle showing a significant increase in estrus and metestrus phases and decrease in diestras and proestrus phases. The extract also significantly reduced the number of healthy follicles (Class I-Class VI) and corpora lutea and increased the number of regressing follicles (Stage IA, Stage IB, Stage IIA, and Stage IIB). The protein and glycogen content in the ovaries were significantly reduced in treated rats. The cholesterol level was significantly increased, whereas, the enzyme activities like 3b-HSD and 17b-HSD were...
Tipo: Journal article Palavras-chave: Trichosanthes cucumerina L. var. cucumerina; Antifertility; Folliculogenesis; Estrous cycle; Gonadotropins; 3 b-HSD; 17 b-HSD activity; Ovarian steroidogenesis.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000100030
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Effect of urea in the diet on ovarian follicular dynamics and plasma progesterone concentration in Alpine goats R. Bras. Zootec.
Alves,Nadja Gomes; Torres,Ciro Alexandre Alves; Guimarães,José Domingos; Moraes,Elenice Andrade; Rodrigues,Marcelo Teixeira; Cecon,Paulo Roberto; Bitencourt,Luciene Lignani; Amorim,Lincoln da Silva.
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 estrous cycles were characterized by occurrence of two, three, four or five follicular waves. The emergence day of the first follicular wave in cycles with two waves, the length of the third wave and the maximum diameter of the largest follicle of the third wave in cycles with three waves presented a quadratic behavior according to the percentage of urea in the diets. In cycles with four waves, the urea...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Corpus luteum; Estrous cycle; Follicular development; Protein.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700016
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Effects of ethanol extract of Cenostigma macrophyllum Tul. (caneleiro) on reproductive parameters of female rats Plantas Medicinales
Barbosa Santos,Denise; Guerra de Oliveira,Jamylla Mirck; Neto Bueno,Martins; Bezerra Sales,Paulo Alex; Sena Costa,Charllyton Luis; Chaves,Mariana Helena; Carvalho e Martins,Maria do Carmo; Raposo Costa,Amilton Paulo.
Tipo: Journal article Palavras-chave: Reproductive toxicity; Estrogenic activity; Estrous cycle.
Ano: 2015 URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962015000300002
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Effects of hCG administration on accessory corpus luteum formation and progesterone production in estrous-induced nulliparous Santa Inês ewes. Repositório Alice
FONSECA, J. F. da; CASTRO, A. C. R.; ARASHIRO, E. K. N.; OLIVEIRA, M. E. F.; ZAMBRINI, F. N.; ESTEVES, L. V.; BRANDÃO, F. Z.; SOUZA-FABJAN, J. M. G..
Abstract: The effect of hCG administration on accessory corpus luteum (ACL) formation, CL area, and plasma progesterone (P4) concentration (ng/mL) seven days after breeding was studied in nulliparous Santa Inês sheep. Intravaginal 60 mg MAP sponges were inserted into ewes for six days and 300 IU eCG i.m. and 30 ?g d-cloprostenol latero-vulvar were administered 24 h before sponge removal. Ewes were naturally bred and, seven days after first mating (Day 0; D0), were treated with either 250 IU hCG (hCG group; n = 7) or 1 mL saline solution (control group; n = 7). Blood was collected to determine plasma P4 concentrations and sonograms were performed on Days 7, 10, 13, 16, 19, and 22. Number of CL on D7 was similar (P > 0.05) between hCG (1.3 ± 0.5) and...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Ultrasound; CL; Luteotropic effect; Ovulation induction; Taxa de concepção; Ovino; Corpo Lúteo; Progesterona; Ovulação; Ciclo Estral; Ultrassom; Reprodução Animal; Prenhez; Sheep; Corpus luteum; Progesterone; Brazil; Estrous cycle; Animal reproduction; Ewes; Conception rate; Pregnancy rate.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1093405
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Estrous cycle and stress: influence of progesterone on the female brain BJMBR
Lovick,T.A..
The female brain operates in a constantly changing chemical milieu caused by cyclical changes in gonadal hormones during the estrous cycle (menstrual cycle in women). Such hormones are highly lipophilic and pass readily from the plasma to the brain where they can influence neuronal function. It is becoming clear that the rapid reduction in peripheral circulating progesterone, which occurs during the late diestrous phase of the cycle, can trigger a withdrawal-like response, in which changes in GABA A receptor expression render hyper-responsive certain brain areas involved in processing responses to stressful stimuli. The periaqueductal gray matter (PAG) is recognised as an important region for integrating anxiety/defence responses. Withdrawal from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Female; Estrous cycle; Stress; Anxiety; Progesterone; Neurosteroid replacement.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000400005
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Evaluation of the Estral Cycle in Rats after Treatmen twith Dexamethasone for Polycystic Ovaries, Induced by Constant Illumination International Journal of Morphology
Barros,Heitor Arôxa; Moraes,Eleonora Figueredo de; Maia,Carina Scanoni; Teixeira,Álvaro Aguiar Coelho; Teixeira,ValériaWanderley.
The study aimed at obtaining basic information about estrous cycle in rats treated with dexamethasone, for polycystic ovaries, induced by constant illumination. It was used 30 female rats (Rattus norvegicus albinus) from the lineage Wistar, with 90 days years old, divided according the following groups: Group I - rats maintained in a light/dark cycle for 12/12 hours, and after 100 days submitted to the cyclicity evaluation (control); Group II - rats maintained under constant illumination during 100 days and after submitted to the cyclicity evaluation; Group III - rats maintained under constant illumination during 100 days and after treated with dexamethasone for five days, and, then, submitted to the cyclicity evaluation. The results showed that after 100...
Tipo: Journal article Palavras-chave: Estrous cycle; Polycystic ovaries; Dexamethasone; Rats.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000400035
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Expression Patterns of the Implantation-associated Genes in the Uterus during the Estrous Cycle in Mice OAK
LEE, Dong-Soo; YANAGIMOTO UETA, Yoshiko; XUAN, Xuenan; IGARASHI, Ikuo; FUJISAKI, Kozo; SUGIMOTO, Chihiro; TOYODA, Yutaka; SUZUKI, Hiroshi; 玄, 学南; 五十嵐, 郁男; 鈴木, 宏志.
The mRNA expression patterns of EGF, HB-EGF, Amphiregulin, EGF receptor, IGF-1, CSF-1, IL-1 alpha, IL-1 beta, IL-1 receptor type 1, IL-1 receptor antagonist, LIF, COX-1, COX-2, Mucin-1, calcitonin, and rat USAG-1 mouse homologue, all of which are involved in the process of conceptus implantation to the endometrium, were examined during the estrous cycle by means of real-time quantitative PCR. COX-2, HB-EGF, LIF, Mucin-1, CSF-1, IL-1 alpha, IL-1 beta, and IL-1 receptor antagonist were temporally regulated during the estrous cycle and highly expressed during the estrous stage. In the case of COX-1, EGF, IGF-1, and EGF receptor, the highest mRNA expression was during the diestrous stage. In contrast, the rat USAG-1 mouse homologue mRNA expression did not...
Palavras-chave: Estrous cycle; Implantation; Mice; Ovarian hormone.
Ano: 2005 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3022
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Fecal estradiol and progesterone metabolite levels in the three-toed sloth (Bradypus variegatus) BJMBR
Mühlbauer,M.; Duarte,D.P.F.; Gilmore,D.P.; da Costa,C.P..
The present study was carried out to assess the possibility of measuring fecal steroid hormone metabolites as a noninvasive technique for monitoring reproductive function in the three-toed sloth, Bradypus variegatus. Levels of the estradiol (E2) and progesterone (P4) metabolites were measured by radioimmunoassay in fecal samples collected over 12 weeks from 4 captive female B. variegatus sloths. The validation of the radioimmunoassay for evaluation of fecal steroid metabolites was carried out by collecting 10 blood samples on the same day as defecation. There was a significant direct correlation between the plasma and fecal E2 and P4 levels (P < 0.05, Pearson's test), thereby validating this noninvasive technique for the study of the estrous cycle in...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Sloth; Fecal estrogen and progestogen metabolites; Noninvasive monitoring; Estrous cycle; Fecal hormones.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000200017
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Follicular dynamics in Serrana goats IPB - Escola Superior Agrária
Simão, J.; Almeida, José Carlos; Valentim, Ramiro; Azevedo, Jorge; Fontes, Paulo; Mascarenhas, R..
Twenty-two Serrana goats were studied through two successive estrous cycles in order to characterize their follicular dynamics during the breeding season. The ovaries of the goats were scanned daily by realtime ultrasonography and all follicles ≥3mm were measured and classified. The data were classified by the number of follicular waves per goat to test the hypothesis that temporal and morphological differences between the last follicular wave of an ovary, irrespective of ovulation, will affect the selection of the next ovulatory wave. The mean interovulatory interval was 20.7±1.0 days (mean±S.D.). Three to five waves per estrous cycle were observed and 61.3% (19/31) of cycles had fourwaves. In estrous cycles with fourwaves, the day of onset of the first,...
Tipo: Article Palavras-chave: Estrous cycle; Follicular dynamics; Ovary; Goat; Ultrasonography.
Ano: 2006 URL: http://hdl.handle.net/10198/5805
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Histomorphometric and functional studies of the rat thyroid throughout the estrous cycle Arq. Bras. Med. Vet. Zootec.
Serakides,R.; Nunes,V.A; Nascimento,E.F.; Serra,G.V..
The influence of the estrous cycle on the thyroid gland was studied. Twenty one five-to-seven-month-old Wistar female rats were divided according to the stage of the estrous cycle in two groups: metaestrus-diestrus and proestrus-estrus. After gross inspection, the thyroids were weighed, sampled, and processed for staining with hematoxilyn-eosin. Seric concentrations of total T4, free T4, total T3, TSH, progesterone, and estradiol were measured. The values of estradiol were significantly higher in the proestrus-estrus stage. However, no significant differences in the plasmatic concentrations of progesterone, free T4, total T4 and TSH throughout the cycle were found. The results of the morphometric study of the thyroid did not indicate any significant...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Rat; Thyroid; Estrous cycle.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352002000100017
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Is the infertility in hypothyroidism mainly due to ovarian or pituitary functional changes? BJMBR
Armada-Dias,L.; Carvalho,J.J.; Breitenbach,M.M.D.; Franci,C.R.; Moura,E.G..
The objective of the present study was to examine whether hypothyroidism affects the reproductive system of adult female rats by evaluating ovarian morphology, uterus weight and the changes in serum and pituitary concentrations of prolactin and gonadotropins. Three-month-old female rats were divided into three groups: control (N = 10), hypothyroid (N = 10), treated with 0.05% 6-propyl-2-thiouracil (PTU) in drinking water for 60 days, and T4-treated group (N = 10), receiving daily sc injections of L-thyroxine (0.8 µg/100 g body weight) during the last 10 days of the experiment. At the end of 50 days of hypothyroidism no hypothyroid animal showed a regular cycle, while 71% of controls as well as the T4-treated rats showed regular cycles. Corpora lutea,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hypothyroidism; Prolactin; Gonadotropins; Folliculogenesis; Estrous cycle.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000900015
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Isolation of Candida spp from vaginal microbiota of healthy canine females during estrous cycle BJM
Cleff,Marlete Brum; Lima,Alzira Pacheco de; Faria,Renata Osório de; Meinerz,Ana Raquel Mano; Antunes,Tatiana de Ávila; Araújo,Flávia Biasoli de; Nascente,Patrícia da Silva; Nobre,Márcia de Oliveira; Meireles,Mário Carlos Araújo.
Yeasts are commensal organisms found in the skin, genital and gastrointestinal tracts, and other mucosa in mammalians. Candida spp has been frequently isolated from domestic and sylvan animals. Yeast isolation from vaginal mucus is frequent in women, especially of Candida genus. In canine females, however, studies about vaginal fungal microbiota are rare and the connection with estrous cycle is unknown. The purpose of this study was to isolate yeast 5 of Candida genus from healthy canine females and identify the isolated species, establishing their connection with estrous cycle phases. Two hundred twenty-four samples taken from vaginal mucus of 14 canine females were analyzed in this study. Candida spp was observed in 83 (37%) from these samples; nine...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Candida spp; Canine females; Estrous cycle.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000200018
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Morphology and vascularization of the corpus luteum of peccaries (Pecari tajacu, Linnaeus, 1758) throughout the estrous cycle. Repositório Alice
MOURA, M. T. M. M.; OLIVEIRA, G. B.; PEIXOTO, G. C. X.; PESSOA, J. M.; PAPA, P. C.; MAIA, M. da S.; MOURA, C. E. B.; OLIVEIRA, M. F..
The current paper characterizes the changes in morphology and vascularization of the corpus luteum of collared peccaries during the estrous cycle and correlates progesterone synthesis (P4). Twenty females were subjected to a treatment for estrus synchronization; an ear implant containing 1.5 mg of norgestomet was implanted on D0, whereas on D9 the peccaries received an IM injection of eCG 200UI and 50g of PGF2a. The animals were divided into four groups (G1, G2, G3 and G4) and euthanized on postovulation days 3, 12, 18 and 22. The ovaries were collected and the corpora lutea were measured and processed for histological and vascular density (Dv). Blood was collected for dosage of P4 serum. The morphology of the ovaries, the corpora lutea and P4 varied...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Cateto; Corpo lúteo; Ciclo estral; Progesterona; Densidade vascular; Produção animal; Animal production; Collared peccary; Corpora lutea; Estrous cycle; Progesterone; Vascular density.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1038133
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Morphology and vascularization of the corpus luteum of peccaries (Pecari tajacu, Linnaeus, 1758) throughout the estrous cycle Arq. Bras. Med. Vet. Zootec.
Miranda-Moura,M.T.M.; Oliveira,G.B.; Peixoto,G.C.X.; Pessoa,J.M.; Papa,P.C.; Maia,M.S.; Moura,C.E.B.; Oliveira,M.F..
The current paper characterizes the changes in morphology and vascularization of the corpus luteum of collared peccaries during the estrous cycle and correlates progesterone synthesis (P4). Twenty females were subjected to a treatment for estrus synchronization; an ear implant containing 1.5 mg of norgestomet was implanted on D0, whereas on D9 the peccaries received an IM injection of eCG 200UI and 50g of PGF2a. The animals were divided into four groups (G1, G2, G3 and G4) and euthanized on post-ovulation days 3, 12, 18 and 22. The ovaries were collected and the corpora lutea were measured and processed for histological and vascular density (Dv). Blood was collected for dosage of P4 serum. The morphology of the ovaries, the corpora lutea and P4 varied...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Collared peccary; Corpora lutea; Estrous cycle; Progesterone; Vascular density.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000100087
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Neonatal handling induces anovulatory estrous cycles in rats BJMBR
Gomes,C.M.; Frantz,P.J.; Sanvitto,G.L.; Anselmo-Franci,J.A.; Lucion,A.B..
Since previous work has shown that stimulation early in life decreases sexual receptiveness as measured by the female lordosis quotient, we suggested that neonatal handling could affect the function of the hypothalamus-pituitary-gonadal axis. The effects of neonatal handling on the estrous cycle and ovulation were analyzed in adult rats. Two groups of animals were studied: intact (no manipulation, N = 10) and handled (N = 11). Pups were either handled daily for 1 min during the first 10 days of life or left undisturbed. At the age of 90 days, a vaginal smear was collected daily at 9:00 a.m. and analyzed for 29 days; at 9:00 a.m. on the day of estrus, animals were anesthetized with thiopental (40 mg/kg, ip), the ovaries were removed and the oviduct was...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Stress; Neonatal handling; Estrous cycle; Ovulation; Female rat.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999001000010
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Plasma progesterone concentrations in Toggenburg goats submitted to estrous induction reusing intravaginal autoclaved progesterone devices. Repositório Alice
SOUZA, J. M. G.; TORRES, C. A. A.; MAIA, A. L. R. S.; BRUSCHI, J. H.; BRANDÃO, F. Z.; VIANA, J. H. M.; FONSECA, J. F. da.
2010
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Progestágeno; Dinâmica folicular; Caprino; Corpo luteo; Ciclo estral; Ovário; Dinâmica folicular; Goats; Corpus luteum; CIDR; Follicles; Ultrasonography; Estrous cycle; Ovarian follicles; Progestagens; Dynamics.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/handle/doc/926993
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Reproduction and Trypanosoma congolense in Nigerian West African Dwarf ewes:I. Effects on the estrous cycle OAK
Abubakar, Y.U.; Oyedipe, E.O.; Eduvie, L.O.; Ogwu, D.O.; Adeyeye, A.A..
Ten cycling Nigerian West African Dwarf (WAD) ewes were used to determine the effect of Trypanosoma congolense infection on the estrous cycle. The estrus of ewes were synchronized using intravaginal progesterone sponges and divided into 2 groups (A and B) of 5 ewes each after 54 days (3 cycles). The ewes in group A were inoculated with blood containing approximately 5×105 trypanosomes per ml of blood while ewes in group B served as the uninfected control. All the ewes were monitored from infection till the end of the study (56 days). Ewes in the infected group had silent estrus with clinical trypanosomosis that was characterized by undulating parasitemia, intermittent pyrexia, anemia and weight loss. There was no statistical (p > 0.05) difference...
Palavras-chave: Infertility; Estrous cycle; Estrus; Trypanosoma congolense; West African dwarf ewe.
Ano: 2015 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4244
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Strategies to prevent the presence of a dominant follicle (DF) between days 15 and 20 of the cow estrous cycle. Repositório Alice
MACHADO, R.; BERGAMASCHI, M. A. C. M.; BARBOSA, R. T.; MADUREIRA, E. H.; FANTINI, D.; BINELLI, M..
2004
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Gado de corte; Estrous cycle.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/46895
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