Title:	Re-utilization of norgestomet implants in superovulated nelore cows.
Authors:	SUDANO, M. J. PASCHOAL, D. M. FALA, A. M. OLIVEIRA, C. A. LANDIM-ALVARENGA, F. C. MACHADO, R.
Affiliation:	M. J. SUDANO, UNESP - BOTUCATU D. M. PASCHOAL, UNESP - BOTUCATU ANGELA MARIA FALA, UNICEP-SÃO CARLOS, SP C. A. OLIVEIRA, VRA, FMVZ-USP, SÃO PAULO F. C. LANDIM ALVARENGA, UNESP-BOTUCATU RUI MACHADO, CPPSE.
Date Issued:	2008
Citation:	Animal Reproduction, v. 6, n. 1, p. 268, jan./mar. 2009.
Description:	The re-utilization of progestin implants is an alternative to reduce costs in protocols to induce ovulation in cows. The objective of this study was to evaluatethe re-utilization ofnotgestomet implants in Nelore cows superovulated with eCG. The methodology proposedaimed the reduction of costs with supe~:bvulationprotocols in Nelore embryo transfer programs. [il Materials and Methods: The experimentwas performed at Embrapa experimentalfarm, located in Sao Carlos in the southeastof Brazil. Eight Nelore cows (Bos tourus indicus) were randomly distributed in two experimentalgroups. Group 1: On DO,a random day of the estrus cycle, half of the cows receiveda new norgestometimplant (Crestar@,1ntervet)and 2 mg 1M of estradiol benzoate (BE) (Estrogin@,Farmavet)and Group 2: On DOthe other half received 2 norgestomet implants, which were used before during 8 days,and also 2 mg of BE. On D4 cows from both groupsreceivedone single dose of2000 ill ofeCG (FoUigon@,Intervet). On D6 two dosesofPGF2a(150 /.lg) (Sincrocio@,Ourofmo) were administrated.The implants were removed 36 hours after the first PGFzaand 12.5mg ofLH 1M (Lutropin-V@, Bioniche) was administered 48 hours after the PGFza.The cows were artificially inseminated12 to 24 hours after LH injection with semenfrom just one bull. The number of follicles with ability to ovulate was estimatedthrough transrectal ultrasonography(MINDRA Y DP 3300) at the moment of LH administration(D8) and the ovulationrate was estimated on D15. The cows were flushed on D15 and blood samples were collected for progesterone radioimunoassay using LDH from FMVZ-USP. The results were analyzed through unpaired t Test and Fisher's Exact Test with a significant level of 5% (P < 0.05).
Thesagro:	Gado de Corte Gado Nelore
NAL Thesaurus:	norgestomet
Type of Material:	Resumo em anais e proceedings
Access:	openAccess
Appears in Collections:	Resumo em anais de congresso (CPPSE)