Data/hora: 03/06/2024 04:49:23

Provedor de dados: 	65	
País: 	Brazil	
Título: 	Delaying farrowing using intravaginal devices impregnated with progestagen does not affect the proportion of piglets born alive	
Autores: 	Freling,Gabriel Fernando; Gasperin,Bernardo Garziera; Ferreira,Rogério; Cesaro,Matheus Pedroti; Oliveira,João Francisco; Bordignon,Vilceu; Gonçalves,Paulo Bayard Dias.	
Data: 	2013-07-01	
Ano: 	2013	
Palavras-chave: 	Programmed farrowing; Alive/total born piglets ratio; Medroxyprogesterone acetate.	
Resumo: 	The objective of this study was to evaluate the efficiency of progestagen intravaginal devices (IVDs) in preventing parturition in sows by determining the effect of delaying parturition on the alive/total born piglets ratio. Evaluations of IVDs containing 0.5, 1.0 or 1.5g progesterone (P4) showed they were not effective in delaying parturition at any dosage tested. In a second experiment, seventy-five sows at day 112 of pregnancy were equally distributed (n=15 per group) in the following treatments: prostaglandin (PGF2α; 250µg sodium cloprostenol; control group) or PGF2α and simultaneous insertion of an IVD containing medroxyprogesterone acetate (MPA) for 48h. Control sows initiated labor 27.7±1.6h after PGF2α injection. The mean time (±SEM) between PGF2α administration and parturition was 72.1±8.8h, 72.7±3.8h, 82.7±7.1h and 81.8±3.5h for MPA 100, 200, 400 and 800mg, respectively, differing from control group (P&lt;0.05). To evaluate the effect of delaying parturition on the alive/total born piglets ratio at birth, sows between days 109 and 112 of gestation received IVDs containing 800mg MPA (on Thursdays) for 72h to prevent parturition in weekends and then were treated with PGF2α at the time of device withdrawal (on Sundays). The alive/total born piglets ratio was 89.0±1.6, 90.1±1.2 and 89.0±1.5% for control (Normal group; n=57 sows), PGF2α-induced (Induced group; n=57 sows), and IVD+PGF2α-induced (MPA800 group, n=56 sows) groups, respectively (P&amp;gt;0.05). These findings confirm that IVDs impregnated with MPA can effectively prevent parturition in sows without affecting the alive/total born piglets ratio and therefore represent an alternative to avoid weekend farrowing in swine herds.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000700018	
Editor: 	Universidade Federal de Santa Maria	
Relação: 	10.1590/S0103-84782013005000077	
Formato: 	text/html	
Fonte: 	Ciência Rural  v.43 n.7 2013	
Fonte: 	info:eu-repo/semantics/openAccess