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| Borges,Luiz Felipe Kruel; Ferreira,Rogério; Siqueira,Lucas Carvalho; Bohrer,Rodrigo Camponogara; Borstmann,Jacson William; Oliveira,João Francisco Coelho de; Gonçalves,Paulo Bayard Dias. |
| The aim was to develop a timed artificial insemination (TAI) system in suckled beef cows. Cows (n=227), 60-80 days postpartum, received estradiol benzoate (5mg) and a vaginal device containing 250µg of medroxyprogesterone acetate (MPA; day 0). On day six, cloprostenol (125µg) and eCG (400IU) were administrated and calves were weaned for 88h. The devices were removed on day seven (BioRep group) or on day eight (TAI group). All cows of TAI group and cows of BioRep group that did not exhibit standing estrus received GnRH (100µg) on day 9. In experiment I, the follicular growth was monitored daily by transrectal ultrasound exams, from day 6 to day 9. The average size of the dominant follicle on day nine was 11.1±0.99mm (BioRep, n=7) and 11.5±0.65mm (TAI, n=7)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cows; Postpartum; TAI; MPA; Ovulation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000200028 |
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| Talini,R.; Kozicki,L.E.; Gaievski,F.R.; Polo,G.; Lima,L.G.F.; Santiago,J.; Segui,M.S.; Weiss,R.R.; Galan,T.G.B.. |
| ABSTRACT The objective of the study was to determine whether or not there is a correlation between thermoresistance tests (TT) after semen thawing and pregnancy rate (PR) after fixed-time artificial insemination (FTAI). Four different TT were performed on ten samples used for AI; a rapid test (RTT) (30min / 46°C) and three slow tests (STT): STT1 (60min/38°C), STT2 (180min/38°C), and STT3 (300min/38°C). Two hundred and fifteen multiparous crossbred cows were submitted to FTAI under the following protocol: on day zero (d0) the animals received a P4 device +EB; on d7 PGF2α; on d8 P4 was removed and eCG+EC were administered; IATF was performed on d10. Three gestational diagnoses (G D) were performed on d40, d70 and d120. The mean sperm motility (%) in RTT and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sperm motility; Casa; Pregnancy rate; Beef cows; Semen thermoresistance test. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000602085 |
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| Rocha,T.G.; Franciosi,C.; Nociti,R.P.; Silva,P.C.; Sampaio,A.A.M.; Fagliari,J.J.. |
| Avaliou-se a influência do número de parições nos valores de alguns parâmetros bioquímicos e do perfil eletroforético do soro lácteo de vacas de corte. Trinta e cinco vacas da raça Canchim foram alocadas em cinco grupos: vacas de primeira lactação, segunda lactação, terceira e quarta lactações, quinta lactação e sexta lactação. As amostras de secreção láctea foram coletadas imediatamente após (dia 0) e 1, 2, 7, 15 e 30 dias após o parto. As concentrações de gamaglutamiltranferase (GGT), proteína total, cálcio, fósforo, magnésio e cálcio ionizado foram avaliadas. A separação eletroforética das proteínas foi realizada em matriz de gel de poliacrilamida (SDS-PAGE). A atividade de GGT e as concentrações de imunoglobulina G, cálcio e fósforo não foram... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cows; Biochemistry; Parity; Colostrum; Milk. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000100043 |
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| Ferreira,Rogério; Oliveira,João Francisco Coelho de; Antoniazzi,Alfredo Quites; Pimentel,Cláudio Alves; Moraes,José Carlos Ferrugem; Henkes,Luiz Ernani; Bordignon,Vilceu; Gonçalves,Paulo Bayard Dias. |
| The objective of this study was to investigate the causes of the repeat breeder syndrome comparing clinical signs and postmortem findings in beef cows. The identification of factors affecting the reproductive tract can support decisions as to whether treatment of repeat breeder cows is justifiable than culling. Since all animals were submitted to clinical examination before being slaughtered, this study has a differential approach when compared with others, where genital tracts from abattoir were examined. In this study, 130 crossbred cows and heifers that have failed to conceive after three or more services were identified, submitted to a clinical examination and blood collection for karyotyping and sent to an abattoir. postmortem examinations included... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Repeat breeder; Beef cows; Cattle; Infertility; Theriogenology. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000400023 |
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