Global ETD Search
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Showing 1 to 9 of 9 for “"Follicular wave"”.
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The effects of varying the interval from follicular wave emergence to progestin withdrawal on follicular dynamics and the synchrony of estrus in beef cattle
… examine the effects of varying the interval from follicular wave emergence to progestin removal on follicular dynamics and the synchrony of estrus. The experimental design was a 2x2x2 factorial with GnRH or estradiol-17 beta (E2) + progesterone (P4), controlled internal drug-releasing device …
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Progestin regulation of follicular dynamics in beef cattle
… of 14 days of progestin (CIDR) treatment on follicular dynamics (length of follicular wave and maximum follicle diameter) and serum concentrations of progesterone (P4) in beef cattle treated with a new or previously used CIDR. Serum concentrations of P4 for heifers in the New and Used CIDR …
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The Effects of a GnRH Antagonist, Cetrorelix, on Ovarian Function in Cattle
… effects of a GnRH antagonist, cetrorelix, on the follicular dynamics in cattle during different stages of follicular growth and in different endocrine milieus. The specific objective was to test the hypothesis that cetrorelix would induce regression of the dominant follicle and induce a new …
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Follicular dynamics, estradiol-17[beta] concentrations, and luteinizing hormone release following norgestomet implant insertion during estrus synchronization with melengestrol acetate
… administration altered LH pulse frequency and follicular dynamics. Multiparous Angus cows were randomly assigned to receive MGA (.5 mg*cow⁻¹*d⁻¹ ; MGA; n = 14) for 18 d or to receive MGA (.5 mg*cow·⁻¹ l*d⁻¹; MGA-N; n = 11) for 15 d and a norgestomet implant for 4 d beginning on d 15. …
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Genetic Profiling of the Bovine Pituitary Gland Using cDNA Microarray Technology
… (FSH), which regulate steroidogenesis and follicular development. Currently, intrapituitary factors that modulate gonadotropin synthesis, storage, and release are not well described, thus, requiring investigation. To investigate the validity of the microarray results, we performed real-time …
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Methods to Synchronize Estrus, Enhance Pregnancy, and Rescue Embryos in Cattle
… in days to emergence and ovulation of a new follicular wave, ovulation rate and ovulated follicle size when EB (0 vs 4 mg; P > 0.05) was administered. More follicles classified as ""maintained"" were observed in the 0 mg group (P = 0.01; 0 mg-53%; 4 mg-0%). The effect of an IPI during and …
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Embryo Production by Superovulation and Dual Siring in Alpacas
… to induce ovulation and emergence of a new follicular wave. Starting at 60 h post-hCG/GnRH, females received twice daily intramuscular injections of FSH at decreasing doses (i.e. Day 1 = 50mg; Day 2 = 40 mg; Day 3 = 30; Days 4 to 7 = 20 mg). Administration of FSH was discontinued when half …
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The efficiency of ultrasonorgraphy in monitoring ovarian structures and foetal development in goats, sheep and cattle as verified through laparoscopy and laparotomy
… and pregnancy diagnosis. In monitoring the follicular dynamics, daily ultrasonography (ULTS) scanning was done for 17 days in sheep and for 21 days in both goats and cattle. Follicles of diameter ≥ 3 mm were selected for analysis of growth, ovulation and regression. For determining the …
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Presynchronizing injections of prostaglandin F[subscript]2alpha[subscript] or prostaglandin F[subscript]2alpha[ subscript + Gonadotropin-releasing hormone before a fixed time artificial insemination CO-Synch + CIDR program in suckled beef cows
We hypothesized that pregnancy outcomes may be improved by inducing luteal regression, ovulation, or both before a control CO-Synch + CIDR program (100 mcg GnRH i.m. [GnRH-1] and insertion of a progesterone-impregnated intravaginal controlled internal drug release [CIDR] insert on d -10, 25 mg …