Title:	Luteal dynamics in goats: morphological and endocrine features.
Authors:	ARASHIRO, E. K. N. VIANA, J. H. M. FONSECA, J. F. da CAMARGO, L. S. de A. FERNANDES, C. A. de C. BRANDÃO, F. Z.
Affiliation:	Eduardo Kenji Nunes Arashiro, UFF; JOAO HENRIQUE MOREIRA VIANA, CNPGL; JEFERSON FERREIRA DA FONSECA, CNPC; LUIZ SERGIO DE ALMEIDA CAMARGO, CNPGL; CARLOS ANTÔNIO DE CARVALHO FERNANDES, UNIFENAS; FELIPE ZANDONADI BRANDÃO, UFF.
Date Issued:	2010
Citation:	Revista Brasileira de Zootecnia, v. 39, n. 9, p. 1937-1942, 2010.
Description:	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, luteal area was smaller in animals with single ovulation. Plasma P4 concentration progressively increased until day 9 and it did not show significant increase until luteolysis, characterized by a sharp decrease in P4 concentration, reaching values below 1 ng/mL in 24 hours. The luteal area slowly and gradually decreased in size. It was observed a significant positive correlation between P4 concentration and area during luteogenesis and luteolysis (r = 0.63 and r = 0.50, respectively). When corpus luteum reached its maximum size (D9), female with more than one corpora lutea, with a greater luteal tissue area, did not show P4 concentration higher than those with one ovulation (5.92 ± 0.59 vs 7.04 ± 0.79 ng/mL). These results show that luteal dynamics in Toggenbur goats follow a similar pattern to those observed in other goat breeds and luteal tissue growth was positively correlated with corpora lutea functionality.
NAL Thesaurus:	corpus luteum goats progesterone ultrasonography
DOI:	https://doi.org/10.1590/S1516-35982010000900011
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGL)