scholarly journals Genetic Analysis of the Twenty-One-Day Pregnancy Rate in US Holsteins Using an Ordinal Censored Threshold Model with Unknown Voluntary Waiting Period

2007 ◽  
Vol 90 (4) ◽  
pp. 1987-1997 ◽  
Author(s):  
Y.M. Chang ◽  
O. González-Recio ◽  
K.A. Weigel ◽  
P.M. Fricke
Keyword(s):  
Genetic Analysis ◽  
Pregnancy Rate ◽  
Threshold Model ◽  
Waiting Period ◽  
Voluntary Waiting Period

scholarly journals REDUCTION OF THE VOLUNTARY WAITING PERIOD BY USE OF HORMONAL PROTOCOLS AND FIXED-TIME ARTIFICIAL INSEMINATION (FTAI) IN DAIRY COWS

2012 ◽  
Vol 17 (3) ◽  
Author(s):  
Miriane Suplicy ◽  
Haroldo Suplicy Filho ◽  
Luiz Ernandes Kozicki ◽  
José Carlos dos Santos Breda ◽  
Romildo Romualdo Weiss ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Pregnancy Rate ◽  
Artificial Insemination ◽  
Post Partum ◽  
Fixed Time ◽  
Estradiol Benzoate ◽  
Control Group ◽  
Waiting Period ◽  
Equine Chorionic Gonadotropin ◽  
Voluntary Waiting Period

ABSTRACT: The aim of this study was to reduce the waiting voluntary period in dairy cows by administration of two different hormonal protocols for estrus synchronization and fixed-time artificial insemination (FTAI). One hundred twenty-eight Holstein dairy cows were studied. Three groups (G) were carried out: G1 (44 treated), G2 (34 treated) and G3 (50 as control). In the treated cows the following hormonal protocols was applied between 40 and 45 days post partum: G1- Day 0 (D0) - bovine intravaginal device containing progesterone (P4) plus 1.0 mg of estradiol benzoate (EB), D8 - removal of the P4, plus 0.5 mg of cloprostenol plus 400 IU of equine chorionic gonadotropin (eCG), D9 - 1.0 mg of EB and FTAI after 36 hours. G2 - D0 - P4 intravaginal plus 50 mcg of gonadotropin-releasing hormone (GnRH), D7 - removal of the P4 plus cloprostenol plus 400 IU eCG; D9 - 50 mcg of GnRH and FTAI 16 hours after. G3 – Control group inseminated 12 hours after the visual estrus. Results: G1 and G2 were inseminated (FTAI) respectively in the D55.5 and D56.8 after calving, while the G3 in the D84.5 (p<0.01).  The pregnancy rate in the G1, G2 and G3 was respectively 47.0, 46.1 and 35.8% (p>0.05).  In Conclusion: there was significant reduction in the voluntary waiting period in treated cows and higher pregnancy rate although not significant.

Development of a predictive model for daughter pregnancy rate and standardization of voluntary waiting period in Murrah buffalo

2013 ◽  
Vol 46 (1) ◽  
pp. 279-284 ◽  
Author(s):  
Chandrashekhar S. Patil ◽  
Atish Kumar Chakravarty ◽  
Avtar Singh ◽  
Vijay Kumar ◽  
Valsalan Jamuna ◽  
...  
Keyword(s):  
Predictive Model ◽  
Pregnancy Rate ◽  
Waiting Period ◽  
Murrah Buffalo ◽  
Voluntary Waiting Period

Genetic analysis of francisellosis field outbreak in Atlantic cod (Gadus morhua L.) using an ordinal threshold model

Aquaculture ◽  
2014 ◽  
Vol 420-421 ◽  
pp. S50-S56 ◽  
Author(s):  
Rama Bangera ◽  
Jørgen Ødegård ◽  
Helene Mikkelsen ◽  
Hanne Marie Nielsen ◽  
Marit Seppola ◽  
...  
Keyword(s):  
Genetic Analysis ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Threshold Model

1270 Profitability of dairy cows managed for first service with the Double-Ovsynch or Presynch-Ovsynch protocol and different duration of the voluntary waiting period

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 612-613
Author(s):  
M. L. Stangaferro ◽  
R. Wijma ◽  
M. Masello ◽  
G. E. Granados ◽  
J. O. Giordano
Keyword(s):  
Dairy Cows ◽  
Waiting Period ◽  
Voluntary Waiting Period

scholarly journals Genetic Analysis of Disposition and Milking Speed in Holstein by Threshold Model

1993 ◽  
Vol 64 (10) ◽  
pp. 1038-1040 ◽  
Author(s):  
Tamotsu ISOGAI ◽  
Hideki ENDO ◽  
Yasuko TANIGUCHI ◽  
Yutaka IKEUCHI
Keyword(s):  
Genetic Analysis ◽  
Threshold Model
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