The 'Ram Effect': A 'Non-Classical' Mechanism for Inducing LH Surges in Sheep.

Autor: Claude Fabre-Nys, Audrey Chanvallon, Joëlle Dupont, Lionel Lardic, Didier Lomet, Stéphanie Martinet, Rex J Scaramuzzi

Publikováno v: PLoS ONE, Vol 11, Iss 7, p e0158530 (2016)

During spring sheep do not normally ovulate but exposure to a ram can induce ovulation. In some ewes an LH surge is induced immediately after exposure to a ram thus raising questions about the control of this precocious LH surge. Our first aim was to

Externí odkaz: https://doaj.org/article/b50a957448dd4d5a9bef8f8ebd78ea44

The effect of the intracervical administration of FSH or LH on the levels of hyaluronan, COX2, and COX2 mRNA in the cervix of the nonpregnant ewe

Autor: Rex J. Scaramuzzi, Sukanya Leethongdee, Muhammad Khalid

Publikováno v: Theriogenology. 86:2244-2253

During the periovulatory period, the cervix relaxes in response to changes in circulating concentrations of reproductive hormones. The present study investigated the role of gonadotrophins in cervical function by examining the expression of cyclooxyg

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b654ec3cd53459038991503abc94c29
https://doi.org/10.1016/j.theriogenology.2016.07.014

The Effect of the Intracervical Application of Follicle-Stimulating Hormone or Luteinizing Hormone on the Pattern of Expression of Gonadotrophin Receptors in the Cervix of Non-Pregnant Ewes

Autor: S Leethongdee, Muhammad Khalid, Rex J. Scaramuzzi

Publikováno v: REPRODUCTION IN DOMESTIC ANIMALS

Contents During the periovulatory period, the cervix relaxes in response to changes in circulating concentrations of reproductive hormones. The present study investigated the role of gonadotrophins in cervical function by examining the expression of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a576802232e8dff2c9c7fb0263856099
https://doi.org/10.1111/rda.12312

New insights into the influence of breed and time of the year on the response of ewes to the ‘ram effect’

Autor: Audrey Chanvallon, L. Sagot, T. Fassier, Dominique François, C. Fabre-Nys, Nathalie Debus, Rex J. Scaramuzzi, E. Pottier

Publikováno v: Animal, Vol 5, Iss 10, Pp 1594-1604 (2011)
animal
animal, Cambridge University Press (CUP), 2011, 5 (10), pp.1594-1604. ⟨10.1017/S1751731111000668⟩
Animal
Animal, Published by Elsevier (since 2021) / Cambridge University Press (until 2020), 2011, 5 (10), pp.1594-1604. ⟨10.1017/S1751731111000668⟩
Animal 10 (5), 1594-1604. (2011)
animal, Published by Elsevier (since 2021) / Cambridge University Press (until 2020), 2011, 5 (10), pp.1594-1604. ⟨10.1017/S1751731111000668⟩

Exposure of anoestrous ewes to rams induces an increase in LH secretion, eventually leading to ovulation. This technique therefore is an effective, low-cost and hormone-free way of mating sheep outside the breeding season. However, the use of this te

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfcaced2e2452bdb4209cbc2c4bd51e6
http://www.sciencedirect.com/science/article/pii/S1751731111000668

Nutritional and Metabolic Mechanisms in the Ovary and Their Role in Mediating the Effects of Diet on Folliculogenesis: A Perspective

Autor: Rex J. Scaramuzzi, J. Dupont, Hannah M. Brown

Publikováno v: Reproduction in Domestic Animals. 45:32-41

Folliculogenesis in ruminants is a nutritionally sensitive process, and short-term increases in nutrient flux can stimulate folliculogenesis in sheep and cattle. These short-term effects are probably mediated directly at the follicular level to modif

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::668741fca6c2bf81fd689e5e0d24559c
https://doi.org/10.1111/j.1439-0531.2010.01662.x