Title:	Short, medium or long-term hormonal treatments for induction of synchronized estrus and ovulation in Saanen goats during the nonbreeding season.
Authors:	PIETROSKI, A. C. C. A. BRANDÃO, F. Z. SOUZA, J. M. G. de FONSECA, J. F. da
Affiliation:	ANA CAROLINA CUNHA ARAUJO PIETROSKI, UNIVERSIDADE FEDERAL FLUMINENSE FELIPE ZANDONADI BRANDÃO, UNIVERSIDADE FEDERAL FLUMINENSE JOANNA MARIA GONÇALVES DE SOUZA, UNIVERSIDADE ESTADUAL DO CEARÁ JEFERSON FERREIRA DA FONSECA, CNPC.
Date Issued:	2013
Citation:	Revista Brasileira de Zootecnia, v. 42, n. 3, p. 168-173, 2013.
Description:	Abstract: The objective of this study was to compare the effect of hormonal treatment duration through the use of intravaginal sponges impregnated with 60 mg MAP for 6 (G6; n = 10), 9 (G9; n = 10) or 12 (G12; n = 10) days. All nulliparous (n = 15) and lactating (n = 15) Saanen goats received 37.5 µg d-cloprostenol and 200 IU eCG 24 hours before sponge removal during the nonbreeding season. After sponge removal, estrus was monitored twice a day (06h00 and 18h00) by the use of fertile bucks. Transrectal ovarian ultrasonography was performed after device removal until ovulation detection. All goats were bred by artificial insemination (AI) or natural breeding (NB). All females received 250 IU hCG 5 d after AI or NB. No difference was observed among groups G6, G9 and G12 for: estrous response (90.0, 100.0 and 100.0%, respectively); interval from sponge removal to estrus (26.7±5.6, 25.2±2.8 and 25.2±3.3 hours), duration of estrus (28.5±7.1; 21.6±3.0 and 25.2±6.1 hours); ovulation rate (80.0, 100.0 and 70.0%); number of ovulations (1.9±0.2, 1.5±0.2 and 1.4±0.2); and pregnancy rate (60.0, 80.0 and 50.0%). Interval from sponge removal to ovulation was shorter in animals from G6 (44.6±2.2 hours) than for animals from G9 (52.8±2.7 hours) and G12 (60.0±4.5 hours). All treatments were effective in the induction of synchronized estrus in Saanen goats during the nonbreeding season, but ovulation occurred earlier when goats received sponges for 6 days.
Thesagro:	Caprino Cabra Reprodução animal Endocrinologia Hormônio Ciclo estral Sincronização do cio Ovulação Fertilidade Comportamento sexual
NAL Thesaurus:	Goats Animal reproduction Ultrasonography Ovulation
Keywords:	Raça Saanen Ultra-Som Goat Oestrus synchronization Sexual behaviour Synchronized females
DOI:	http://dx.doi.org/10.1590/S1516-35982013000300004
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPC)