Zobrazeno 1 - 10
of 50
pro vyhledávání: '"D.M.W. Barrett"'
Autor:
Behzad M. Toosi, Ashley Ziegler, R. Duggavathi, K.L. Davies, Norman C. Rawlings, D.M.W. Barrett, Srinivas V. Seekallu
Publikováno v:
Biology of Reproduction. 83:122-129
Large antral follicles grow in waves in the ewe, and each wave is triggered by a peak in serum concentrations of FSH. The existence of follicular dominance in the ewe is unclear. The objective of experiment 1 was to determine if an endogenously drive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a00f39e00e3ea79740d3eb54125491d
https://doi.org/10.1095/biolreprod.109.081950
https://doi.org/10.1095/biolreprod.109.081950
Publikováno v:
Animal Reproduction Science. 116:73-84
Ovarian steroidogenesis and antral follicular development in ewes, following the treatment with medroxyprogesterone acetate (MAP) and equine chorionic gonadotrophin (eCG), are affected by the reproductive season. The objective of this study was to co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae651da6dd9f7161c0015b7d370656de
https://doi.org/10.1016/j.anireprosci.2009.01.011
https://doi.org/10.1016/j.anireprosci.2009.01.011
Publikováno v:
Biology of Reproduction. 78:490-496
The mechanisms of ovulatory compensation following unilateral ovariectomy (ULO) are still not understood. In the present study, we investigated the short- and long-term effects of ULO in sheep using transrectal ovarian ultrasonography and hormone est
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44376163f33ea5025a2a88120fddf3ef
https://doi.org/10.1095/biolreprod.107.064188
https://doi.org/10.1095/biolreprod.107.064188
Publikováno v:
Reproduction in Domestic Animals. 43:299-307
In ruminants, superovulatory treatments started at the time of follicular wave emergence result in greater and less variable ovulatory responses and embryo yields compared with the treatments begun in the presence of a large growing antral follicle(s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5b78bc61ed51c401d41232e36fef394
https://doi.org/10.1111/j.1439-0531.2007.00894.x
https://doi.org/10.1111/j.1439-0531.2007.00894.x
Autor:
D.M.W. Barrett, Pawel M. Bartlewski, R. Duggavathi, Norman C. Rawlings, K.L. Davies, E.T. Bagu
Publikováno v:
Biology of Reproduction. 77:252-262
In a previous study, 10-day estradiol implant treatment truncated the FSH peaks that precede follicular waves in sheep, but subsequent ovine FSH (oFSH) injection reinitiated wave emergence. The present study's objectives were to examine the effects o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e74cf9cddf193d25f86497e2b4fc626
https://doi.org/10.1095/biolreprod.106.058842
https://doi.org/10.1095/biolreprod.106.058842
Autor:
N.C. Rawlings, Roger A. Pierson, D.M.W. Barrett, Xinyu Liu, E.J. Hart, Q. Dai, Pawel M. Bartlewski
Publikováno v:
Reproduction in Domestic Animals. 42:393-401
The aim of this study was to assess the ultrasonographic characteristics of ovulatory follicles in cyclic Western White Face ewes (December) that had received intravaginal sponges containing medroxyprogesterone acetate (MAP; 60 mg) for 12 days, with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::686d5c4d11ebb6af11add40a34ae947e
https://doi.org/10.1111/j.1439-0531.2006.00798.x
https://doi.org/10.1111/j.1439-0531.2006.00798.x
Publikováno v:
Biology of Reproduction. 75:633-641
Follicle waves are preceded by follicle-stimulating hormone (FSH) peaks in ewes. The purpose of the present study was to see whether estradiol implant treatment would block FSH peaks to create a model in which the effect of the timing and mode of FSH
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13d78e093e28807973765993483427e0
https://doi.org/10.1095/biolreprod.105.048702
https://doi.org/10.1095/biolreprod.105.048702
Autor:
Qiao Dai, D.M.W. Barrett, Pawel M. Bartlewski, Norman C. Rawlings, Ezra J. Hart, R. Duggavathi, Xinyu Liu
Publikováno v:
Theriogenology. 66:811-821
In the ewe, a rise in circulating concentrations of FSH preceding follicular wave emergence begins in the presence of growing follicles from a previous wave. We hypothesized that prostaglandin F(2alpha) (PGF(2alpha)) given at the time of an endogenou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b01885dfa4a1f10821e0ba1a46bdd21e
https://doi.org/10.1016/j.theriogenology.2006.01.057
https://doi.org/10.1016/j.theriogenology.2006.01.057
Autor:
D.M.W. Barrett, E.T. Bagu, Rajesha Duggavathi, K.L. Davies, Pawel M. Bartlewski, S.J. Cook, N.C. Rawlings, T. Epp
Publikováno v:
Theriogenology. 66:251-259
In a previous study in our laboratory, treatment of non-prolific Western White Face (WWF) ewes with PGF(2 alpha) and intravaginal sponges containing medroxyprogesterone acetate (MAP) on approximately Day 8 of a cycle (Day 0 = first ovulation of the i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3980cd54b5e17f62165dfea9c6513b8b
https://doi.org/10.1016/j.theriogenology.2005.08.027
https://doi.org/10.1016/j.theriogenology.2005.08.027
Autor:
Baljit Singh, E.T. Bagu, Jaswant Singh, Norman C. Rawlings, R. Duggavathi, D.M.W. Barrett, K.L. Davies, Kyathanahalli S. Janardhan
Publikováno v:
Animal Reproduction Science. 91:345-352
The expression patterns of steroidogenic enzymes in ovarian antral follicles at various stages of growth in a follicular wave have not been reported for sheep. Ovaries were collected from ewes (n=4-5 per group) when the largest follicle(s) of the fir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93e2cfc854c778008592e93b03f346ce
https://doi.org/10.1016/j.anireprosci.2005.05.020
https://doi.org/10.1016/j.anireprosci.2005.05.020