Journal ArticleDOI
Acute fasting in heifers as a model for assessing the relationship between plasma and follicular fluid NEFA concentrations.
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TLDR
The presence of high plasma NEFA concentrations might link energy metabolism in early lactation with fertility, and concentrations of NEFA in follicular fluid and plasma were closely related.About:
This article is published in Theriogenology.The article was published on 2003-06-01. It has received 64 citations till now. The article focuses on the topics: NEFA & Follicular fluid.read more
Citations
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Journal ArticleDOI
Non-esterified fatty acids in follicular fluid of dairy cows and their effect on developmental capacity of bovine oocytes in vitro.
J.L.M.R. Leroy,Tom Vanholder,Bart Mateusen,A Christophe,Geert Opsomer,A. de Kruif,Gaëtan Genicot,A. Van Soom +7 more
TL;DR: In vitro results suggest that NEB may hamper fertility of high-yielding dairy cows through increased NEFA concentrations in FF affecting oocyte quality, and non-esterified fatty acids being the predominant fatty acids in FF.
Journal ArticleDOI
Lipids and oocyte developmental competence: the role of fatty acids and β-oxidation.
TL;DR: In this paper, the importance of fat metabolism during oocyte maturation is recognized, and β-oxidation is induced in cumulus-oocyte complexes (COCs) by the LH surge.
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Oleic Acid Prevents Detrimental Effects of Saturated Fatty Acids on Bovine Oocyte Developmental Competence
Hilde Aardema,Peter L.A.M. Vos,Francesca Lolicato,Bernard A.J. Roelen,H.M. Knijn,Arie B. Vaandrager,J. Bernd Helms,Bart M. Gadella +7 more
TL;DR: The results suggest that the ratio and amount of saturated and unsaturated fatty acid is relevant for lipid storage in the maturing oocyte and that this relates to the developmental competence of matured oocytes.
Journal ArticleDOI
Metabolic changes in follicular fluid of the dominant follicle in high-yielding dairy cows early post partum
J.L.M.R. Leroy,Tom Vanholder,J.R Delanghe,Geert Opsomer,A. Van Soom,P. E. J. Bols,Jeroen Dewulf,A. de Kruif +7 more
TL;DR: The results from the present study confirm that the typical metabolic adaptations which can be found in serum of high-yielding dairy cows shortly post partum, are reflected in follicular fluid and, therefore, may affect the quality of both the oocyte and the granulosa cells.
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Effect of non-esterified fatty acids on bovine granulosa cell steroidogenesis and proliferation in vitro.
TL;DR: It is concluded that PA, SA and to a lesser degree OA modulate granulosa cell proliferation and steroidogenesis in vitro and may be involved in the occurrence of ovarian dysfunction during the postpartum period in high-yielding dairy cows.
References
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Journal ArticleDOI
Effects of energy balance on follicular development and first ovulation in postpartum dairy cows
S W Beam,W.R. Butler +1 more
TL;DR: In this paper, the relationship between daily energy balance and postpartum reproductive activity is confirmed by longer intervals to first ovulation in cows with greater body condition loss and increased LH pulse frequency following the energy balance nadir in dairy cows.
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Reduction in size of the ovulatory follicle reduces subsequent luteal size and pregnancy rate
José Luiz Moraes Vasconcelos,José Luiz Moraes Vasconcelos,Roberto Sartori,Henrique Nunes de Oliveira,J.G. Guenther,Milo C. Wiltbank +5 more
TL;DR: In conclusion, ovulation of smaller follicles produced lowered fertility possibly because development of smaller CL decreased circulating progesterone concentrations.
Journal ArticleDOI
The ovarian insulin and insulin-like growth factor system with an emphasis on domestic animals
TL;DR: Evidence for a coherent mechanism by which insulin, IGFs, and IGFBPs interact and regulate ovarian function in vivo has yet to be found.
Journal Article
Effects of energy balance on follicular development and first ovulation in postpartum dairy cows.
S W Beam,W.R. Butler +1 more
TL;DR: Positive relationships between changes in energy balance, peripheral IGF-I and function of dominant follicles support the identification of IGF-i and the day of the energy balance nadir as metabolic modulators of postpartum ovarian activity in dairy cows.
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Current status of the hypothesis that mammalian ovulation is comparable to an inflammatory reaction.
TL;DR: This presentation reviews current information on the events that lead to rupture of an ovarian follicle and contains a summary of the morphological changes that occur at the apex of a follicle wall during ovulation.