Avaliação da eficiência do Norgestomet, Valerato de Estradiol e Gonadotrofina Coriônica humana na sincronização de estro em fêmeas eqüinas
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Data
2007-02-28
Autores
Bernardoni, Victor Hugo [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Com o objetivo de avaliar diferentes protocolos de sincronização de estro em éguas cíclicas da raça Campolina, 46 animais foram divididos em 5 grupos (I, II, III, IV e V); grupo I (10 animais) recebeu uma injeção IM de 2ml de norgestomet (3 mg) + valerato de estradiol (5 mg) e um implante de silicone via SC de norgestomet (3mg) por 9 dias; grupo II (10 animais) recebeu injeção IM de 5 mg de valerato de estradiol + 3mg de norgestomet; grupo III (10 animais) recebeu implante SC de silicone de norgestomet (3mg) por 9 dias; grupo IV (8 animais) recebeu uma injeção IM única de 2ml de norgestomet (3 mg) + valerato de estradiol (5 mg) e um implante via subcutânea de norgestomet + uma injeção IM única de hCG (2.500 UI); grupo V (8 animais) recebeu injeção única de hCG (2.500 UI). Ao término do tratamento (D9), todas as éguas dos 5 grupos receberam uma injeção IM de 7,5 mg de dinoprost-trometamina. Todas as éguas foram submetidas à avaliação ultra-sonográfica de dois dias anteriores ao início do tratamento (D0), objetivando-se a análise retrospectiva dos dois maiores folículos (F1 e F2). Embora não tenha sido constatada diferença (p>0,05) entre os grupos experimentais quanto à freqüência de sincronização, o grupo IV mostrouse eficiente com 100% de sincronização em D15, D16, D17 e D18 após o início do tratamento (D0). Pela avaliação ultra-sonográfica constatou-se que não houve supressão da atividade folicular durante o tratamento nos diferentes grupos experimentais, embora, nos grupos onde se utilizou norgestomet e valerato de estradiol, folículos menores ou iguais a 22 mm estabilizaram seu desenvolvimento durante o tratamento.
With the objective of evaluate protocols of estrus synchronization in Campolina ciclic mares, 46 animals were grouped into 5 groups (I, II, III, IV e V); group I (10 animals) was treated with 3 mg norgestomet + 5 mg estradiol valerate intramuscular injection and a subcutaneous implant of norgestomet (3mg) during 9 days; group II (10 animals) received 5 mg of estradiol valerate + 3 mg of norgestomet by intramuscular injection; group III (10 animals) consisted on mares was treated with 3 mg norgestomet + 5 mg estradiol valerate intramuscular injection and a subcutaneous implant of norgestomet during 9 days; group IV (8 animals) was received 3 mg norgestomet + 5 mg estradiol valerate intramuscular injection + intramuscular injection of hCG (2,500 UI) and a subcutaneous implant of norgestomet during 9 days; group V (8 animals) was treated with unique intramuscular injection of hCG (2,500 UI). At progestogen treatment removal (9th. day), all mares from the 5 groups received one intramuscular injection of dinoprost-trometamina (7.5 mg). All mares were daily evaluated by rectal palpation and ultrasound examination for since two days before beginning of the treatment retrospectively measurement of the largest and second largest follicles. The results had demonstrated that even so the frequency of synchronization of estrus has not presented differences between experimental groups (p>0,05), group IV revealed efficiency with 100% of synchronization in D15, D16, D17 and D18 after the beginning of the treatment (D0). The ultra-sonographic evaluation showed even so that there was not suppression of the folicular activity during treatment in the different experimental groups, that in the groups where norgestomet and valerato of estradiol was used follicles equal or minors 22 mm had stabilized its development during the treatment.
With the objective of evaluate protocols of estrus synchronization in Campolina ciclic mares, 46 animals were grouped into 5 groups (I, II, III, IV e V); group I (10 animals) was treated with 3 mg norgestomet + 5 mg estradiol valerate intramuscular injection and a subcutaneous implant of norgestomet (3mg) during 9 days; group II (10 animals) received 5 mg of estradiol valerate + 3 mg of norgestomet by intramuscular injection; group III (10 animals) consisted on mares was treated with 3 mg norgestomet + 5 mg estradiol valerate intramuscular injection and a subcutaneous implant of norgestomet during 9 days; group IV (8 animals) was received 3 mg norgestomet + 5 mg estradiol valerate intramuscular injection + intramuscular injection of hCG (2,500 UI) and a subcutaneous implant of norgestomet during 9 days; group V (8 animals) was treated with unique intramuscular injection of hCG (2,500 UI). At progestogen treatment removal (9th. day), all mares from the 5 groups received one intramuscular injection of dinoprost-trometamina (7.5 mg). All mares were daily evaluated by rectal palpation and ultrasound examination for since two days before beginning of the treatment retrospectively measurement of the largest and second largest follicles. The results had demonstrated that even so the frequency of synchronization of estrus has not presented differences between experimental groups (p>0,05), group IV revealed efficiency with 100% of synchronization in D15, D16, D17 and D18 after the beginning of the treatment (D0). The ultra-sonographic evaluation showed even so that there was not suppression of the folicular activity during treatment in the different experimental groups, that in the groups where norgestomet and valerato of estradiol was used follicles equal or minors 22 mm had stabilized its development during the treatment.
Descrição
Palavras-chave
Equino - Reprodução, Estro, Éguas
Como citar
BERNARDONI, Victor Hugo. Avaliação da eficiência do Norgestomet, Valerato de Estradiol e Gonadotrofina Coriônica humana na sincronização de estro em fêmeas eqüinas. 2007. 59 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Medicina Veterinária e Zootecnia de Botucatu, 2007.