Zobrazeno 1 - 10
of 28
pro vyhledávání: '"B E, Voelz"'
Publikováno v:
J Anim Sci
Primary objectives of this study were to compare concentrations of pregnancy-associated glycoprotein (PAG) before calving, prolactin (PRL) after calving, and energy balance indicators before and after calving in cooled cows classified as having high
Autor:
Jeffrey S. Stevenson, L. Rocha, Luís G.D. Mendonça, G.T. Lima, Alexandre L A Scanavez, B. E. Voelz
Publikováno v:
Theriogenology. 124:39-47
Objectives of experiment 1 were to evaluate pregnancy outcomes and reinsemination patterns of cows whose estrous cycles or ovulation were presynchronized with prostaglandin (PGF2α) or PGF2α and gonadotropin-releasing hormone (GnRH) after non-pregna
Publikováno v:
Journal of Dairy Science. 101:9575-9590
We hypothesized (1) that neither duration of the Ovsynch program nor dose frequency of PGF2α would change the proportion of cows with complete luteolysis (progesterone 60%), Double Ovsynch cows tended to have greater ovulatory responses than PG-3-G
Publikováno v:
Theriogenology. 110:27-33
Two experiments were performed to test the hypothesis that administering PGF2α concurrent with timed artificial insemination (AI) in lactating dairy cows would enhance pregnancy per AI (P/AI). In experiment 1, lactating Holstein cows (n = 289) in on
Publikováno v:
Reproduction in Domestic Animals. 53:751-758
Production from the corpus luteum (CL) and/or hepatic steroid inactivation impacts peripheral concentrations of P4, which can alter reproductive performance. Our primary objective was to examine hepatic steroid inactivating enzymes, portal blood flow
Publikováno v:
Journal of Animal Science. 96:56-65
Purulent vaginal discharge (PVD) is a common uterine disease in dairy cattle that has negative effects on reproductive performance. Reproductive management programs that synchronize ovulation use gonadotropin-releasing hormone (GnRH) to induce ovulat
Autor:
B. E. Voelz, Madumali Kalubowilage, Luís G.D. Mendonça, Stefan H. Bossmann, Ricardo C. Chebel, Deryl L. Troyer
Publikováno v:
Theriogenology. 97:83-88
Metritis, a uterine disease caused by bacterial infection, is highly prevalent in dairy cattle after parturition. Uterine disease has negative effects on milk production and reproductive efficiency. Finding markers or indicators that can predict cows
Publikováno v:
Theriogenology. 141
We hypothesized that a shortened version of a modified Ovsynch program (OVS: GnRH-1 − 7 d − PGF2α-1 − 24 h − PGF2α-2 − 32 h − GnRH-2 − 16 h − AI) that excluded GnRH-1 to resynchronize ovulation in cows bearing a corpus luteum (CL) a
Publikováno v:
Journal of Dairy Science. 99:7612-7623
The objectives of the experiments were to compare ovarian responses, pregnancy per artificial insemination, and pattern of insemination of 2 estrus detection-based presynchronization protocols before first artificial insemination (AI) during heat str
Publikováno v:
Journal of Animal Science. 94:90-95
The aim of this study was to determine if fescue toxicosis altered blood perfusion in the corpus luteum (CL) and peripheral concentrations of progesterone in cattle. The estrous cycles of 36 nonpregnant Angus or Charolais cows were synchronized in 2