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 Cristina Giometti and Cali{\^e} Castilho},
  year={2013}
}
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… Expand

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TLDR
The interval from ovulation to follicular deviation (2.7 days) was similar to that previously reported in B. taurus females, but follicles were smaller and diameters of the dominant follicle and subordinate follicle did not differ before deviation and deviation was characterized by an increase in dominant follicles and decrease in subordinate follicles growth rate. Expand
Effects of dominant follicle aspiration and treatment with recombinant bovine somatotropin (BST) on ovarian follicular development in nelore (Bos indicus) heifers.
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In agreement with previous reports on B. taurus, dominant follicle aspiration synchronized ovarian follicular development, and BST treatment increased peripheral concentrations of IGF-I in Nelore heifers. Expand
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TLDR
The emergence of Wave 1 and growth rates and diameters of the future dominant follicles at the beginning of deviation were similar in Nelore heifers and nonlactating cows, regardless of the methods used to determine deviation. Expand
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TLDR
F follicles acquired ovulatory capacity at about 10 mm, corresponding to about 1 day after the start of follicular deviation, but they required a greater LH dose to induce ovulation compared with larger follicles, suggesting that acquisition of ovulatorycapacity may involve an increased expression of LH receptors on granulosa cells of the dominant follicle. Expand
Relationship between follicular development and the decline in the follicle-stimulating hormone surge in heifers.
TLDR
The presence of endogenous progesterone did not affect FSH patterns or follicular development and the hypothesis that 3-mm follicles do not have FSH-suppressing capacity and that suppression increases as follicles grow beyond 5 mm was tested. Expand
Follicular function in lactating dairy cows treated with sustained-release bovine somatotropin.
TLDR
Serum concentrations of bST and insulin-like growth factor I were lowest during saline injections and increased after bST injections, while Peak concentrations of serum FSH were lower and occurred earlier for the cows treated with bST. Expand
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TLDR
In conclusion, recombinant bST positively affected (at day 3) the proportion of OCC and oocytes maturing to MII, and the level of insulin-like growth factor I in sera from bST treated animals was significantly higher than inSera from control animals. Expand
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There was no significant difference between observed and calculated methods of determining the beginning of follicle deviation, and the size at which the DF acquires ovulatory capacity in B. indicus heifers. Expand
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The results of the two experiments indicated, on a temporal basis, that intrafollicular changes in estradiol and the IGF system, but not in the inhibin/activin system, could account for a reported greater FSH responsiveness by the future dominant follicle than by thefuture subordinate follicles by the beginning of diameter deviation in cattle. Expand
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The results indicate that a close temporal coupling between a change in FSH concentrations and the follicular response could establish the deviation mechanism in < 8 h or before the second largest follicle reaches a similar critical diameter. Expand
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