• Corpus ID: 53419350

FOLLICULAR DYNAMICS AND PLASMA FSH CONCENTRATIONS DURING FOLLICULAR DEVIATION IN THE FIRST POST-OVULATORY WAVE IN TABAPUA (Bos indicus) COWS TREATED WITH BOVINE SOMATOTROPIN (bST)*

@inproceedings{Arnone2013FOLLICULARDA,
  title={FOLLICULAR DYNAMICS AND PLASMA FSH CONCENTRATIONS DURING FOLLICULAR DEVIATION IN THE FIRST POST-OVULATORY WAVE IN TABAPUA (Bos indicus) COWS TREATED WITH BOVINE SOMATOTROPIN (bST)*},
  author={Bianca Arnone and C. B. Negr{\~a}o and Leonardo da Fonseca and Castro Brito and In{\^e}s and C. B. Giometti and Cali{\^e} Castilho},
  year={2013}
}

• Bianca Arnone, C. Negrão, +4 authors C. Castilho
• Published 15 December 2013
• Biology

ABSTRACT. Arnone B., Negrao C.B., Brito L.F.C., Giometti I.C. & Castilho C. Follicular dynamics and plasma FSH concentrations during follicular deviation in the first post-ovulatory wave in tabapua (Bos indicus) cows treated with bovine somatotropin (bST). [Dinâmica folicular e concentracao plasmatica de FSH durante a primeira onda pos-ovulatoria em vacas Tabapua (Bos indicus) tratadas com somatotrofina bovina (bST)]. Revista Brasileira de Medicina Veterinaria, 35(4):318-322, 2013. Programa de Pos-Graduacao em Ciencia Animal, Universidade do Oeste Paulista, Rodovia Raposo Tavares, Km 572, Presidente Prudente, SP 19067-175, Brasil. E-mail: [e-mail]. The objective of the present study was to evaluate follicular dynamics and plasma FSH concentrations during the first post-ovulatory wave in Bos indicus cows treated with bovine somatrotopin (bST). Diameters of ovarian follicles and plasma FSH concentrations were determined every 12 h until 5 d after ovulation in 10 Tabapua cows, half of which had been treated with 500mg bST. Treatment did not affect follicular diameters, follicular dynamics, ovulation-to-follicular deviation interval, or FSH concentrations. Follicular deviation was characterized primarily by a decrease in the growth rate of the largest subordinate follicle and occurred 54 h after ovulation when plasma FSH concentrations were decreasing. Mean diameters of the dominant and largest subordinate follicles at the time of deviation were 6.31 and 6.24 mm, respectively. In conclusion, bST did not affect follicular dynamics and plasma FSH concentrations in B. indicus cows. Follicular deviation occurred during a period of decreasing FSH concentration and no diameter differences between the dominant and largest subordinate follicle were observed prior to deviation.