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Effects of negative energy balance on reproduction in dairy cows
Summary In many countries the milk production per cow has more than doubled in the last 40 years (OLTENACU, 2007). The increase in production has been accompanied by increasing incidence of health problems, de...
Author: RENATE KNOP, H. CERNESCU
Publication date: 11/03/2009    Rating:    Views: 1022

The Affects of Nutrition on Reproductive Performance
Often farmers are plagued with the reality of poor reproductive performance in their herds. Heat detection generally is the single greatest reason for poor reproductive performance in dairy herds today. But wha...
Author: B. A. Broaddus, P. D. Burns and Donna Amaral-Phillips, University of Kentucky
Publication date: 07/16/2009    Rating:    Views: 650

BIOMEDICAL APPLICATIONS OF GENETICALLY ENGINEERED AND CLONED ANIMALS
Biomedicine is the application of the principles of the natural sciences, especially biochemistry, molecular biology, and microbiology, to human and veterinary clinical medicine. The field of biomedicine offers...
Author: Bill Pohlmeier and Alison Van Eenennaamp, Department of Animal Science, University of Californ...
Publication date: 07/01/2009    Rating:    Views: 795

Techniques to Maximize Conception Rates
Factors governing reduced reproductive performance in dairy cattle are numerous and often difficult to diagnose. In general, those factors resulting from fertilization failure (e.g., semen handling and AI techn...
Author: Jeffrey S. Stevenson, Dept. of Animal Sciences, Kansas State University
Publication date: 06/17/2009    Rating:    Views: 249

Managing The Postpartum Cow To Maximize Pregnancy Rates
The main objective of a reproductive program in a dairy herd should be to maximize pregnancy rate (PR) to first service. Pregnancy rate is the product of the heat detection and conception rates of the herd (PR ...
Author: Carlos A. Risco, DVM, College of Veterinary Medicine, University of Florida (Gainesville) Dair...
Publication date: 01/05/2009    Rating:    Views: 925

Improving Dairy Cow Fertility through Genetics
Dairy cows today produce twice as much milk per lactation as cows did in 1957 (Figure 1). This improvement has come about because of genetic selection for milk yield, improved feeding practices and other change...
Author: Peter J. Hansen - Department of Animal Sciences, University of Florida (Gainesville) – 44th Fl...
Publication date: 12/17/2008    Rating:    Views: 1983

Effect of Vitamin E and Selenium on anoestrus and conception of dairy cattle
The changing trends in animal production require the owner/manager to become more efficient in all aspects of the production cycle. Major contributors to economic returns include reproduction and nutritional ma...
Author: Susim Ray - College of Veterinary Science, West Bengal University of Animal & Fishery Sciences...
Publication date: 10/27/2008    Rating:    Views: 2383

Milk progesterone analysis for determining reproductive status
Poor reproductive performance is one of the most costly and difficult problems for dairy and livestock  producers. Even in some well-managed herds, reproductive failure continues to be one of the primary reason...
Author: Michael L. O’Connor - Department of Dairy and Animal Science, The Pennsylvania State Universit...
Publication date: 09/16/2008    Rating:    Views: 1054

Timed Artificial Insemination Conception Rates in Response to a Progesterone Insert in Lactating Dairy Cows
Our objective was to determine the effectiveness of exogenous progesterone in the form of an intravaginal insert (controlled internal drug release, CIDR) in conjunction with an ovulation-synchronization protoco...
Author: C. A. Martel, B. S. Buttrey, M. G. Burns, W. E. Brown, and J. S. Stevenson - Dairy Research 20...
Publication date: 07/29/2008    Rating:    Views: 1361

Dairy Crossbreeding Research: Results from Current Projects
Many dairy producers practice some crossbreeding, and the numbers increase every year. Motivating factors include a desire to improve fertility, survival, milk components, and calving ease. Some producers want ...
Author: Bennet Cassell, Professor and Extension Specialist, Dairy Science, Virginia Tech and Jack McAl...
Publication date: 07/08/2008    Rating:    Views: 660