Correlação morfométrica do ovário de fêmeas bovinas em diferentes estádios reprodutivos

Nascimento, Aparecida Alves do; Pinheiro, Nadja Lima; Sales, Armando; Viana, J. H. M.

doi:10.1590/s1413-95962003000200006

Cited by 12 publications

(15 citation statements)

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“…Moreover, the weight of CL is a significant fraction of the total weight of the ovary. Similar findings were described by Nascimento et al (2003) when studying morphometric changes of the ovary and the CL of cows. These authors stated that this fact favors monitoring the reproductive activity of the animal, when CL are internalized or not projected on the surface of the ovary, because the gonad size will help the identification of animals that present cyclic ovarian activity (Sprecher et al 1989, Ribadu et al 1994.…”

Section: Discussionsupporting

confidence: 84%

“…Parameters related to the morphology of CL are often used to estimate the estrous cycle stage (Ireland et al 1980, Nascimento et al 2003, Ferreria-Dias et al 2006). The present study revealed significant effect of the estral cycle phase on the weight, size and area of the goats' CL (p<0.05).…”

Section: Discussionmentioning

confidence: 99%

“…Luteal tissue mass was calculated using the ellipse area defined by the highest and lowest diameter of the CL (Nascimento et al 2003). Blood samples were collected by puncture of the jugular vein and centrifuged at 4000rpm, for 5min under 5°C and kept at 20° until plasma progesterone was assessed by RIA.…”

Section: Animals and Synchronization Treatment/estrous Inductionmentioning

confidence: 99%

“…During the estrous cycle there are growth and atresia of a variable follicle number (Ginther et al 1989, Roche et al 1991, formation and regression of corpus luteum (Kastelic et al 1990), phenomena which influence directly morphological characteristics of the ovary. The morphological characteristics of the ovary can also be useful to verify the pathological presence of cists and tumors as well as to determine the presence of a cyclic ovarian activity and even to estimate the probable cycle phase, allowing one to infer on the animal's fertility status (Nascimento et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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Morphological features and vascularization study of caprine cyclic corpus luteum

et al. 2010

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RESUMO.-[Características morfológicas e estudo da vascularização do corpo lúteo cíclico de cabras ao longo do ciclo estral.] O corpo lúteo é uma glândula endócrina temporária que regula tanto o ciclo estral quanto a prenhez, apresentando extrema dependência de aporte sanguíneo adequado. Objetivaram-se avaliar mudanças morfométricas dos ovários e densidade vascular (DV) dos corpos lúteos (CL) de cabras ao longo do ciclo estral (AOLC). Vinte animais foram submetidos ao tratamento para indução/sincronização do estro, usando esponjas intravaginais com Corpus luteum is a temporary endocrine gland that regulates either the estrous cycle and pregnancy. It presents extreme dependency on the adequate blood supply. This work aims to evaluate goat corpus luteum (CL) vascular density (VD) over the estrous cycle. For that purpose, 20 females were submitted to estrus synchronization/ovulation treatment using a medroxyprogesterone intra-vaginal sponge as well as intramuscular (IM) application of cloprostenol and equine chorionic gonadotrophine (eCG). After sponge removal, estrus was identified at about 72hs. Once treatment was over, female goats were then subdivided into 4 groups (n=5 each) and slaughtered on days 2, 12, 16 and 22 after ovulation (p.o). Ovaries were collected, withdrawn and weighted. CL and ovaries had size and area recorded. Blood samples were collected and the plasma progesterone (P4) was measured through RIA commercial kits. The VD was 24.42±6.66, 36.26±5.61, 8.59±2.2 and 3.97±1.12 vessels/mm 2 for days 2, 12, 16 and 22 p.o, respectively. Progesterone plasma concentrations were 0.49±0.08, 2.63±0.66, 0.61±0.14 and 0.22±0.04ng/ml for days 2, 12, 16 e 22 p.o, respectively. Studied parameters were affected by the estrous cycle phase. Values greater than 12 p.o were observed. In the present work we observed that ovulation occurred predominantly in the right ovary (70% of the animals), which in turn presented bigger measures than the contra lateral one. There is a meaningful relationship between the weight and size of the ovary and these of CL (r=0.87, r=0.70, respectively, p<0.05). It is possible to conclude that morphology of goat's ovaries and plasma progesterone concentration changed according to estrous cycle stages. We propose these parameters can be used as indicators of CL functional activity.

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Animals and Synchronization Treatment/estrous Inductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphological features and vascularization study of caprine cyclic corpus luteum

et al. 2010

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“…Ainda neste sentido, Chacur et al (2006) esclarecem, de forma semelhante à Nascimento (2003), que os ovários de vacas mestiças apresentam características morfológicas conforme a fase do ciclo estral. Esta morfologia, conforme os autores, pode ser utilizada como parâmetro na avaliação clínica e funcional do ovário.…”

Section: Discussionunclassified

Estudos De Algumas Correlações Dos Ovários Com Os Corpos Lúteos E O Desenvolvimento Fetal Em Fêmeas De Bovinos Nelore

Trevisan¹,

Souza²

2012

Biotemas

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Submetido em 22/07/2011 Aceito para publicação em 09/01/2012 ResumoForam avaliados os ovários direitos e esquerdos de 30 vacas prenhes da raça Nelore, cujo aparelhos reprodutores foram coletados em frigoríficos da região de Oeste do Estado de São Paulo. Este material foi conduzido ao Laboratório de Anatomia Animal do campus da Unesp de Araçatuba, para serem analisados o tamanho do feto, por meio de medida occipito-sacral, sua altura e peso. Também foram obtidos dos ovários e corpos lúteos o comprimento, largura e espessura por meio de paquímetro. Destas gônadas foram analisados também o seu peso e volume. Estas informações relativas aos ovários e aos corpos lúteos foram correlacionadas com o desenvolvimento fetal, utilizando o programa SAS para analisar o coeficiente de correlação de Pearson, além de ajustado um modelo de Regressão Linear Simples. Verificou-se que houve correlação significativa entre as variáveis ovários direitos e desenvolvimento fetal, positiva para largura e negativa para espessura. Já entre o corpo lúteo e desenvolvimento do feto houve correlação significativa negativa para o volume. Palavras-chave: Aparelho reprodutor; Feto; Morfologia AbstractStudies of some correlations of ovaries with corpora lutea and fetal development in female Nelore cows. This study evaluated the right and left ovaries of 30 pregnant Nelore cows. The reproductive tracts were collected at slaughterhouses in the western region of the state of São Paulo, and the study was conducted at the Laboratório de Anatomia Animal at UNESP (in Araçatuba). The size (occipitosacral length), height and weight of the fetuses were analyzed. The length, width and thickness (using calipers) of the ovaries and corpora lutea, and weight and volume of the gonads were also measured. The data related to the ovaries and corpora lutea were correlated with fetal development, using a SAS program to analyze the Pearson correlation coefficient, and adjusted using a simple linear regression model. There was a significant correlation between the right ovary variables and fetal development; positive for width and negative for thickness. For the corpora lutea and fetal development, there was a significant negative correlation with the volume.

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Characterization of the ovarian preantral follicle populations and its correlation with age and nutritional status in Brazilian Northeastern donkeys (Equus assinus)

Lopes

Lima

Bezerra

et al. 2017

Animal Reproduction Science

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Correlação morfométrica do ovário de fêmeas bovinas em diferentes estádios reprodutivos

Cited by 12 publications

References 0 publications

Morphological features and vascularization study of caprine cyclic corpus luteum

Morphological features and vascularization study of caprine cyclic corpus luteum

Estudos De Algumas Correlações Dos Ovários Com Os Corpos Lúteos E O Desenvolvimento Fetal Em Fêmeas De Bovinos Nelore

Characterization of the ovarian preantral follicle populations and its correlation with age and nutritional status in Brazilian Northeastern donkeys (Equus assinus)

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