Zobrazeno 1 - 10
of 10
pro vyhledávání: '"J. R. Pursley"'
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023)
Abstract The onset of productive life in dairy cattle, concomitant to parturition, is accompanied by a substantial decrease in fertility in comparison with non-lactating, nulliparous heifers. Follicular growth patterns differ between parous and nulli
Externí odkaz:
https://doaj.org/article/04d8fa8bca32451c816aee59ea333018
Publikováno v:
Reproduction, Fertility and Development. 32:207
Incomplete luteolysis after last prostaglandin F2α (PGF2α) of Ovsynch in fertility programmes decreases the likelihood of pregnancy per AI (P/AI) in lactating dairy cows (Martins et al. 2011 J. Dairy Sci. 94, 2815-2824; https://doi.org/10.3168/jds.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c474c34f74701531953bc51abee092fe
https://doi.org/10.1071/rdv32n2ab161
https://doi.org/10.1071/rdv32n2ab161
Publikováno v:
Large Dairy Herd Management
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cac1262794b4f6d69be452ed8bb6eda4
https://doi.org/10.3168/ldhm.0736
https://doi.org/10.3168/ldhm.0736
Publikováno v:
Journal of dairy science. 100(6)
Pregnancy per artificial insemination (P/AI) following Ovsynch is optimized when cows ovulate to the first GnRH of Ovsynch. Fertility programs are designed to presynchronize cows to d 6 or 7 of the estrous cycle to increase the chances of ovulation o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::f8bf5618340f7f1c22fd80cd4f6a0ce9
https://pubmed.ncbi.nlm.nih.gov/28434724
https://pubmed.ncbi.nlm.nih.gov/28434724
Autor:
M C, Wiltbank, R, Sartori, J L M, Vasconcelos, A B, Nascimento, A H, Souza, A P, Cunha, A, Gumen, S, Sangsritavong, J N, Guenther, H, Lopez, J R, Pursley
Publikováno v:
Society of Reproduction and Fertility supplement. 67
Reduced reproductive efficiency has been reported in high-producing dairy cows. Sources of reproductive inefficiency include decreased expression of estrus, increased diameter of the ovulatory follicle and reduced fertility when cows are inseminated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::43207fdff14bea28e0b23970e990b7f9
https://pubmed.ncbi.nlm.nih.gov/21755676
https://pubmed.ncbi.nlm.nih.gov/21755676
Publikováno v:
Journal of animal science. 82(6)
Ultrasound-mediated intrafollicular injection and aspiration procedures were used to investigate the ability of the selective cyclooxygenase-2 inhibitor, NS-398, to inhibit intrafollicular PGE2 synthesis and suppress ovulation in dairy cattle. Follic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::6a44dd5f54a62a93ba51256f97e17e04
https://pubmed.ncbi.nlm.nih.gov/15216991
https://pubmed.ncbi.nlm.nih.gov/15216991
Publikováno v:
Reproduction (Cambridge, England). 123(5)
The serine proteinases, tissue-type (tPA) and urokinase (uPA) plasminogen activator, are implicated in the ovulatory processes via their ability to convert plasminogen to its active form, plasmin. One mechanism for regulation of plasmin-directed ovar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::fd92ef913e9d66833452f40ee45aea1e
https://pubmed.ncbi.nlm.nih.gov/12006099
https://pubmed.ncbi.nlm.nih.gov/12006099
Publikováno v:
Reproduction, Fertility and Development. 22:223
The chance of a female calf being born is less than that of a male calf from lactating dairy cows (M:F ratio from two large data sets was 54:46; Ryan and Boland 1991 Theriogenology 36, 1-10, and Berry et al. 1995 J. Anim. Sci. 78, 76 abst). Data from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::161503077507fec741b54e37a7ac961a
https://doi.org/10.1071/rdv22n1ab129
https://doi.org/10.1071/rdv22n1ab129
Publikováno v:
Reproduction, Fertility and Development. 18:281
Recent data from our laboratory indicate that increasing the time from AI until ovulation in cattle affects the sex ratio of offspring in favor of females (Pursley et al. 1998 J. Dairy Sci. 81, 2139-2144, and unpublished data). One possible explanati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acd449871c3f4fb43d3aab3ed6e658a3
https://doi.org/10.1071/rdv18n2ab348
https://doi.org/10.1071/rdv18n2ab348