Title:	Morphology and vascularization of the corpus luteum of peccaries (Pecari tajacu, Linnaeus, 1758) throughout the estrous cycle.
Authors:	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.
Affiliation:	M. T. M. MIRANDA MOURA, UFERSA; G. B. OLIVEIRA, UFERSA; G. C. X. PEIXOTO, UFERSA; J. M. PESSOA, Universidade Federal do Rio Grande do Norte; P. C. PAPA, Faculdade de Medicina Veterinária e Zootecnia – FMVZ-USP – São Paulo, SP; MARCIANE DA SILVA MAIA, Embrapa Semiárido; C. E. B. MOURA, UFERSA; M. F. OLIVEIRA, UFERSA.
Date Issued:	2016
Citation:	Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Belo Horizonte, v. 68, n. 1, p. 87-96, 2016.
Description:	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 significantly during the estrous cycle (P<0.001). There was a significant co-relationship between weight and length of the ovaries and CL (r = 0.66, r = 0.52, P<0.05, respectively) and between weight, length and width of the CL and P4 (r = 0.51, r = 0.54 and r = 0.68, P<0.05, respectively). The luteal Dv was highly influenced by the estrous cycle phase (P<0.0001). The P4 and luteal Dv concentrations were higher in G2 and evidenced maximum secretory activity, with a highly significant correlation (P<0.0001). Assessed lutein parameters may estimate the phase of the estrous cycle in peccaries and the functional activity of the corpus luteum.
Thesagro:	Produção animal Ciclo Estral Corpo Lúteo Progesterona
NAL Thesaurus:	Animal production Estrous cycle Progesterone
Keywords:	Cateto Densidade vascular Collared peccary Corpora lutea Vascular density
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPATSA)