Zobrazeno 1 - 10
of 37
pro vyhledávání: '"J.R. Chenault"'
Publikováno v:
Journal of Dairy Science. 86:2050-2060
Milk from pregnant cows contains concentrations of progesterone (P4) considered safe for human consumption. The objective of this study was to determine if concentrations of P4 in milk during administration of an intravaginal progesterone insert (CID
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58776765d40c4f8be96e30ecf2fb7588
https://doi.org/10.3168/jds.s0022-0302(03)73794-1
https://doi.org/10.3168/jds.s0022-0302(03)73794-1
Publikováno v:
Journal of Dairy Science. 86:2039-2049
An intravaginal progesterone insert (CIDR insert; 1.38 g of progesterone) was evaluated for synchronization of returns to estrus (SR), conception rate (CR), and pregnancy rate (PR) in dairy cows previously artificially inseminated (AI). Healthy, nonp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a079f863f79a1a5ab11b821eb06d658
https://doi.org/10.3168/jds.s0022-0302(03)73793-x
https://doi.org/10.3168/jds.s0022-0302(03)73793-x
Publikováno v:
The Professional Animal Scientist. 19:116-123
Intravaginal progesterone (CIDR) inserts consist of a layer of silicone containing 10% progesterone (P4) by weight (1.38 g) molded over a T-shaped nylon spine. In the absence of a corpus luteum, the CIDR insert releases sufficient P4 to maintain conc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37b838ed96da36ce228860630dc6f647
https://doi.org/10.15232/s1080-7446(15)31390-5
https://doi.org/10.15232/s1080-7446(15)31390-5
Publikováno v:
Journal of dairy science. 97(5)
The objectives of the current study were to evaluate the efficacy and field safety of GnRH HCl administered at 3 doses in fixed-time artificial insemination (FTAI) programs (Ovsynch) in dairy cows. A common protocol was conducted at 6 commercial dair
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8440a44e1b9dd07ac0ba2974ce9e0d6
https://pubmed.ncbi.nlm.nih.gov/24582451
https://pubmed.ncbi.nlm.nih.gov/24582451
Autor:
L. Bryson, J. Watkins, E.P. Stanisiewski, J. Hallberg, C.P. Cornell, C.L. McLaughlin, M.J. Lucas, J.R. Chenault, J.K.S. Tena
Publikováno v:
Journal of dairy science. 95(8)
The objectives of this study were to evaluate efficacy of a 2-dose regimen of ceftiofur crystalline free acid sterile suspension (CCFA-SS) for treatment of acute metritis in lactating dairy cows under field conditions and to provide additional safety
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::788aa14445c4231e52f0efed43e0448f
https://pubmed.ncbi.nlm.nih.gov/22818449
https://pubmed.ncbi.nlm.nih.gov/22818449
Publikováno v:
Theriogenology. 34:81-98
This study was conducted to describe the changes in serum LH and FSH concentrations in Holstein heifers following intramuscular (i.m.) injection of various dosages of fertirelin acetate and other commercially available GnRH products at their labeled
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de14c730f833b63c6e6732d6bc3fdb08
https://doi.org/10.1016/0093-691x(90)90579-i
https://doi.org/10.1016/0093-691x(90)90579-i
Autor:
William W. Thatcher, J.R. Chenault
Publikováno v:
Journal of Dairy Science. 59:1366-1375
Prostaglandin F2alpha caused rapid regression of the corpus luteum and initiated normal transitory hormonal patterns that culiminated in ovulation. PGF2alpha was effective in heat stressed heifers and a thermal stress of 32 C caused no major hormonal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c30bcfc1171e89a6f70ecd10a6f30342
https://doi.org/10.3168/jds.s0022-0302(76)84369-x
https://doi.org/10.3168/jds.s0022-0302(76)84369-x
Publikováno v:
Theriogenology. 30:149-157
A synthetic gonadotropin-releasing hormone (GnRH) agonist (fertirelin acetate, FA) was administered to beef cattle within 12 h after onset of estrus (Day = 0) to study effects on subsequent endocrine responses and fertility. In Study 1, 16 crossbred
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3e51c6ec1afcbbfce5e1b818ac59df8
https://doi.org/10.1016/0093-691x(88)90272-5
https://doi.org/10.1016/0093-691x(88)90272-5
Publikováno v:
Journal of Dairy Science. 59:1342-1346
Dairy animals, ranging from days 8 to 13 of the estrous cycle, were fitted with indwelling jugular catheters 1 day prior to either intramuscular injection of prostaglandin F2alpha free acid (30 mg, n=4) or intrauterine deposition of prostaglandin F2a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b43344a170d8ab5222610d6e7bb4038
https://doi.org/10.3168/jds.s0022-0302(76)84366-4
https://doi.org/10.3168/jds.s0022-0302(76)84366-4
Publikováno v:
Journal of Dairy Science. 58:1528-1530
Vaginal thermal conductance was measured in 12 heifers and 7 cows with a gradient layer heat flow probe. Values rose for 4 to 5 days prior to day of behavioral estrus (day 0), with a peak on days −2 and −1, and then declined from day 0 to +5. Cur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7cebaeb55abd091706deee993d3bc2d0
https://doi.org/10.3168/jds.s0022-0302(75)84747-3
https://doi.org/10.3168/jds.s0022-0302(75)84747-3