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Titolo:
Plasma thyroxine and triiodothyronine levels after synchronization of estrus in the breeding season in ewes
Autore:
Gvozdic, D; Stojic, V;
Indirizzi:
Fac Vet Med, Belgrade, Yugoslavia Fac Vet Med Belgrade YugoslaviaFac Vet Med, Belgrade, Yugoslavia
Titolo Testata:
ACTA VETERINARIA-BEOGRAD
fascicolo: 1, volume: 51, anno: 2001,
pagine: 9 - 14
SICI:
0567-8315(2001)51:1<9:PTATLA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
LUTEINIZING-HORMONE; THYROID-GLAND; SECRETION; REPRODUCTION; TRANSITIONS; THYROTROPIN; SUPPRESSION; STEROIDS; CYCLES; SHEEP;
Keywords:
estrous season; ewes; progestagen; thyroxine; triiodothyronine;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Gvozdic, D Fac Vet Med, Bul JNA 18, Belgrade, Yugoslavia Fac Vet Med Bul JNA 18 Belgrade Yugoslavia lgrade, Yugoslavia
Citazione:
D. Gvozdic e V. Stojic, "Plasma thyroxine and triiodothyronine levels after synchronization of estrus in the breeding season in ewes", ACT VET BEO, 51(1), 2001, pp. 9-14

Abstract

Twenty nonpregnant cycling Tsigai ewes in the breeding season were treatedfor synchronization of estrus using intravaginal progestagen sponges (medroxyprogesterone-acetate, MAP) followed by an intramuscular injection of 350-400 IU of pregnant mare serum gonadotrophin (PMSG). A control group of ewes was formed from 20 animals in the natural estrous cycle. Hormonal status was investigated by determination of plasma triiodothyronine (T-3) and thyroxine (T-4) concentrations using radioimmunoassay (RIA). Samples of jugularvenous plasma were collected on the day of sponge insertion (P), the day of estrus (0, day), 7, 14 and 18 days after estrus. Plasma T-3 levels in thecontrol group of ewes were significantly lower compared to the ewes after synchronization of estrus, except the level of T3 on day 18 after estrus. Plasma T-4 level was not significantly different in the treated and control ewes, except on day 18 after estrus.

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Documento generato il 08/04/20 alle ore 09:03:09