%0 Journal Article
%T Resposta superovulat¨®ria e viabilidade de embri es de doadoras Nelore submetidas a pr¨¦-tratamento com Somatotropina Recombinante Bovina (rbST) Superovulatory response and embryo viability of Nelore donors undergo the pre-treatment with Bovine Somatrotopin Recombinant (rbST)
%A L¨ªvia Vieira Vasconcelos
%A Danilo Francisco Campos Pereira
%A Alexandra Soares Rodrigues
%A Marcos Chalhoub
%J Revista Brasileira de Sa¨²de e Produ£¿£¿o Animal
%D 2011
%I Universidade Federal da Bahia
%X Objetivou-se com este estudo avaliar a influ¨ºncia da associa  o de duas doses cont¨ªnuas da Somatotropina Recombinante Bovina (rbST) a um protocolo de superovula  o sobre a quantidade e a qualidade dos embri es produzidos, al¨¦m da taxa de gesta  o de embri es provenientes de doadoras tratadas com a rbST. Foram usadas seis doadoras distribu¨ªdas em tr¨ºs tratamentos experimentais. O primeiro, tratamento I (TI), recebeu uma dose de 500mg de rbST no dia 0 do protocolo de sincroniza  o da onda folicular; o segundo, tratamento II (TII), recebeu duas doses de 500mg rbST, a primeira dose 14 dias antes do in¨ªcio do protocolo e a outra no dia do in¨ªcio do protocolo e o terceiro, tratamento zero (T0), serviu de controle. As m¨¦dias do n¨²mero de estruturas colhidas, embri es vi¨¢veis, taxa de viabilidade, est¨¢dio de desenvolvimento e qualidade embrion¨¢ria n o diferiram estatisticamente entre os tratamentos. As taxas de gesta  o das receptoras foram: TI=55,0% (22/40), TII=60,0% (27/45) e T0=34,4% (11/32). Houve diferen a significativa entre o T0 e TII. Conclui-se que a rbST melhorou as taxas de gesta  o de embri es provenientes de doadoras tratadas com rbST 14 dias antes do in¨ªcio do protocolo e no dia do in¨ªcio do tratamento. The purpose of this study was to evaluate the association of two continuous doses of Recombinant Bovine Somatotropin (rbST), in a protocol of superovulation on the quantity and quality of embryos produced and to evaluate the pregnancy rate of embryos from donors treated with the rbST. Six donors were used divided into three experimental treatments. The first, treatment I (TI), received a dose of 500mg of rbST on day 0 of the protocol of synchronization of follicular wave; the second, treatment II (TII), received two doses of 500mg rbST, the first dose 14 days before the start of the protocol and the other on the start of the protocol and the third, treatment zero (T0), served as control. The means number of structures collected, viable embryos, embryo viability rate, stage of development and embryo quality did not differ significantly between treatments (P>0.05). The pregnancy rates of recipients were: TI = 55,0% (22/40), TII= 60,0% (27/45) and T0 = 34.4% (11/32). There were significant difference between T0 and TII. It is concluded that the rbST improved the pregnancy rate of embryos from donors treated with rbST 14 days before the start of the protocol and the day of starting treatment.
%U http://revistas.ufba.br/index.php/rbspa/article/view/2159