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| Arashiro,Eduardo Kenji Nunes; Viana,João Henrique Moreira; Fonseca,Jeferson Ferreira da; Camargo,Luiz Sérgio de Almeida; Fernandes,Carlos Antônio de Carvalho; Brandão,Felipe Zandonadi. |
| The aim of this study was to establish the morphologic and endocrine characteristics of luteal dynamics in goats. It was used Toggenburg female goats that showed natural estrus in a 48-hour interval. After estrus, ultrasonographic evaluations of the ovaries were daily performed during 21 days using a portable device (5MHz probe). Blood sample was collected for plasma progresterone (P4) determination. Corpora lutea were detected for the first time on day 5 and progressively increased in size until D9 (1.26 ± 0.08 cm²), with no variation on subsequent days. In females with one ovulation, the first visualization of the corpora lutea was earlier than in those with multiple ovulation (4.54 ± 0.18 vs 5.74 ± 0.25 days). At the moment of the first visualization,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corpus luteum; Goats; Progesterone; Ultrasonography. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000900011 |
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| Arashiro,Eduardo Kenji Nunes; Libonati,Hugo; Santos,Gustavo Bervian dos; Nogueira,Luiz Altamiro Garcia; Souza,Guilherme Nunes de; Lilenbaum,Walter; Brandão,Felipe Zandonadi. |
| ABSTRACT: Reproductive efficiency is one of the key elements for any milk production system to be successful. In this regard, reproductive management must be planned properly and the identification of the main reproductive disorders that affect the herd is primordial for decision-making. The aim of the present study was to identify the main reproductive problems that affect dairy herds on Rio de Janeiro (RJ), Brazil. Data regarding breed, age, reproductive disorder occurrence, and breeding system were individually collected from dairy cows raised at 25 farms located at RJ. The occurrence of reproductive disorders was reported in 37% of the studied animals. Estrous repetition (76.2%) and abortion (15.6%) were the most frequent reproductive problems... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cattle; Reproductive disorders; Repeat breeding. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000700701 |
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