Search Results - "BERGFELT, D. R"

Follicle Selection in Monovular Species by GINTHER, O. J, BEG, M. A, BERGFELT, D. R, DONADEU, F. X, KOT, K

“…Follicle deviation is proposed to be the eminent event in follicle selection in monovular species. At deviation, the largest follicle establishes dominance…”
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Comparative Study of the Dynamics of Follicular Waves in Mares and Women by GINTHER, O. J, GASTAL, E. L, GASTAL, M. O, BERGFELT, D. R, BAERWALD, A. R, PIERSON, R. A

“…Deviation in growth rates of the follicles of the ovulatory wave begins at the end of a common growth phase and is characterized by continued growth of the…”
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Evaluation of the ToxRTool’s ability to rate the reliability of toxicological data for human health hazard assessments by Segal, D., Makris, S.L., Kraft, A.D., Bale, A.S., Fox, J., Gilbert, M., Bergfelt, D.R., Raffaele, K.C., Blain, R.B., Fedak, K.M., Selgrade, M.K., Crofton, K.M.

“…•We used ToxRTool to assess toxicology studies for use in health assessments.•The highest quality studies had the most consistent ratings from the…”
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In vivo effects of an intrafollicular injection of insulin-like growth factor 1 on the mechanism of follicle deviation in heifers and mares by GINTHER, O. J, BERGFELT, D. R, BEG, M. A, MEIRA, C, KOT, K

“…In cattle and mares, free insulin-like growth factor 1 (IGF-1) is higher in the future dominant follicle (F1) than in the future largest subordinate follicle…”
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Follicle Selection in Cattle: Dynamics of Follicular Fluid Factors During Development of Follicle Dominance by BEG, M. A, BERGFELT, D. R, KOT, K, GINTHER, O. J

“…Follicle diameter deviation during follicular waves in cattle begins with a reduction in growth rates of developing subordinate follicles, in contrast to the…”
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Follicular-Fluid Factors and Granulosa-Cell Gene Expression Associated with Follicle Deviation in Cattle by BEG, M. A, BERGFELT, D. R, KOT, K, WILTBANK, M. C, GINTHER, O. J

“…Intrafollicular changes in the largest follicle (F1) and second-largest (F2) follicle were examined in relation to follicle diameter deviation. Deviation is…”
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Follicle Selection in Cattle: Follicle Deviation and Codominance Within Sequential Waves by KULICK, L. J, BERGFELT, D. R, KOT, K, GINTHER, O. J

“…Follicle deviation during bovine follicular waves is characterized by continued growth of a developing dominant follicle and reduction or cessation of growth…”
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Mechanism of follicle deviation in monovular farm species by Ginther, O.J., Beg, M.A., Donadeu, F.X., Bergfelt, D.R.

“…Diameter deviation is a distinctive change in growth rates among the follicles of a wave, heralding the formation of a dominant follicle and subordinate…”
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Follicle Selection in Cattle: Role of Luteinizing Hormone by GINTHER, O. J, BERGFELT, D. R, BEG, M. A, KOT, K

“…The circulating concentrations of LH were reduced by administration of 50 mg of progesterone every 8 h for 72 h, beginning when the largest follicle was 6.0 mm…”
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Role of diameter differences among follicles in selection of a future dominant follicle in mares by Gastal, E.L, Gastal, M.O, Bergfelt, D.R, Ginther, O.J

“…Follicles > or = 5 mm were ablated in pony mares by a transvaginal ultrasound-guided technique on Day 10 (ovulation = Day 0). Follicle emergence (at 15 mm,…”
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Morphological characterization of follicle deviation in Nelore ( Bos indicus) heifers and cows by Sartorelli, Evandro S., Carvalho, Luciano M., Bergfelt, D.R., Ginther, O.J., Barros, Ciro M.

“…Follicle diameter deviation is defined as the beginning of the differential change in growth rates between the largest and next largest follicles subsequent to…”
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Selection of the Dominant Follicle in Cattle: Role of Estradiol by GINTHER, O. J, BERGFELT, D. R, KULICK, L. J, KOT, K

“…Involvement of estradiol in the deviation in growth rates between the two largest follicles of a wave was studied in 39 heifers. In experiment 1, the largest…”
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Selection of the dominant follicle in cattle: role of two-way functional coupling between follicle-stimulating hormone and the follicles by Ginther, O.J, Bergfelt, D.R, Kulick, L.J, Kot, K

“…The functional coupling between the declining portion of the FSH surge and the growing follicles of a wave was studied by treating heifers with a minimal dose…”
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Follicle Selection in Cattle: Relationships among Growth Rate, Diameter Ranking, and Capacity for Dominance by GINTHER, O. J, BERGFELT, D. R, BEG, M. A, KOT, K

“…Follicles of wave 1 were designated F1, F2, and so forth, according to descending diameter at the expected (F1, ≥8.2 mm) or observed beginning of deviation…”
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Activin A, Estradiol, and Free Insulin-Like Growth Factor I in Follicular Fluid Preceding the Experimental Assumption of Follicle Dominance in Cattle by GINTHER, O. J, BEG, M. A, BERGFELT, D. R, KOT, K

“…In cattle, the two largest follicles of a wave (F1, F2) begin to deviate into a dominant follicle and a subordinate follicle when F1 is a mean of 8.5 mm in…”
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Role of oestradiol in growth of follicles and follicle deviation in heifers by Beg, MA, Meira, C, Bergfelt, DR, Ginther, OJ

“…Follicle deviation is characterized by continued growth of the largest (developing dominant) follicle and reduced growth of the smaller (subordinate)…”
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Follicle and Endocrine Dynamics During Experimental Follicle Deviation in Mares by GINTHER, O. J, MEIRA, C, BEG, M. A, BERGFELT, D. R

“…Deviation during a follicular wave in mares begins when the largest follicle (F1) reaches a mean diameter of 22.5 mm and is characterized by continued growth…”
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Role of low circulating FSH concentrations in controlling the interval to emergence of the subsequent follicular wave in cattle by Ginther, OJ, Bergfelt, DR, Beg, MA, Kot, K

“…The intervals between emergence of follicular waves 1 (first wave of an oestrous cycle) and 2, and between the associated FSH surges (surges 1 and 2), were…”
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Ultrasound-guided aspiration of dominant follicles (≥25 mm) followed by luteinization and progesterone production during the estrous cycle in mares by Ignácio, F.S., Montechiesi, D.F., Bergfelt, D.R., Orlandi, C.M.B., Carvalho, L.R., Puoli Filho, N.J., Meira, C.

“…The present study was designed to evaluate luteinization rates subsequent to aspiration of dominant follicles (≥25 mm) in the absence of a functional CL…”
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Role of luteinizing hormone in follicle deviation based on manipulating progesterone concentrations in mares by Gastal, E.L, Bergfelt, D.R, Nogueria, G.P, Gastal, M.O, Ginther, O.J

“…The effects of several doses of progesterone on FSH and LH concentrations were used to study the role of the gonadotropins on deviation in growth rates of the…”
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