Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Follicle diameter"”.
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Progestin regulation of follicular dynamics in beef cattle
… luteum, results in the formation of a persistent follicle (PF). Fertilization of a oocyte ovulated from a PF is associated with decreased pregnancy rates. The overall objectives were to determine the effect of 14 days of progestin (CIDR) treatment on follicular dynamics (length of follicular wave …
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HEMODYNAMICS STUDIES OF THE PREOVULATORY FOLLICLE AND CORPUS LUTEUM IN CATTLE
… reproduction success at the farms. Evaluation of follicle and corpus luteum hemodynamics by color-Doppler ultrasonography is becoming more commonly used in cattle reproductive management. Improved understanding of the relationships between size and blood flow of the preovulatory follicle (POF) and …
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Effect of ovulatory follicle size on luteal function, pregnancy rate, and late embryonic/fetal mortality in beef cattle
… indicate that ovulation of small dominant follicles resulted in reduced pregnancy rates compared ovulation of large follicles in cattle. A reciprocal embryo transfer approach was used to differentiate between oocyte competence and uterine environment factors that affect establishment of …
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Strategies for Improving Reproductive Efficiency of Beef Cattle with Assisted Reproductive Technologies
… rich CSSO. There were no changes in dominant follicle diameter, corpus luteum volume, plasma progesterone, or endometrial gene expression (PTGES and AK1B1, PPARA, PPARA, PPARD) between treatments. Plasma and follicular fluid fatty acid compositions were altered between treatments. Experiment 3 …
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Patterns of Nutrient Acquisition in Canvasbacks During Spring Migration
… of ovaries, testes, oviducts, and the largest follicle diameter increased as spring migration phenology advanced. In late migration, ovary and oviduct masses of paired females were greater than in umpired females. Testes masses of paired and unpaired males did not differ.</p> <p>Among sites, …
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Supplementation of Chromium Propionate Positively Impacts Reproductive Performance of Beef Females
… -10, -3, 0 (TAI Day), and 7 to determine the diameter of the largest follicle and corpus luteum (CL) volume. Age, days postpartum (DPP), initial and final BW, and supplement intake were similar (P>0.05) between treatments. However, TRT cows had a larger follicle (P=0.028) on d 0, increased CL …
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ULTRASOUND CHARACTERIZATION OF ANTRAL FOLLICLE DYNAMICS ACROSS THE ADIPOSITY SPECTRUM
… hormone pulse amplitude in addition to lower follicle stimulating hormone (FSH) and anti-Mullerian hormone (AMH) production, albeit controversial. These endocrine aberrations likely reflect alterations in antral ovarian follicle development, but this has never been systematically evaluated in …
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Diâmetro do folículo maior no momento da aplicação do estradiol e taxa de gestação em vacas submetidas à sincronização da ovulação para IATF
Objetivou-se neste estudo, avaliar o efeito do diâmetro folicular no momento da aplicação do estradiol (E2), na taxa de gestação de vacas, que receberam protocolo hormonal de prostaglandina F2α, seguida de E2 para posterior IATF. Foram utilizadas 47 vacas mestiças Bos taurus x indicus apresentando …
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Determining the role of nerve growth factor-beta in seminal plasma on bovine reproduction
… that NGF interacts with the pre-ovulatory follicle to increase vascularity and steroidogenesis, which persists throughout ovulation to create a highly functional and vascular corpus luteum. To test this hypothesis, heifers underwent estrus synchronization and were ovariectomized upon …
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Phenotypic and microbial influences on dairy heifer fertility and calf gut microbial development
… measured. Ultrasound measurements of dominant follicle diameter and corpus luteum volume. Insemination outcome was determined on d 30 using ultrasound and pregnancy was checked on d 42, 56, 70, and 84. Heifers were clustered based on outcome of insemination at d 30 (not pregnant, NP30, n = 24; …