April 12 2012
What's the best timed A.I. program? There are so many synchronization programs that can be used on my dairy herd. My question for a future Artificial Breeding column is which synchronization program would...
April 12 2012
Research papers focused on heifer-specific reproductive issues were presented at the 103rd annual meeting of the American Dairy Science Association in Montreal, Quebec, Canada. In this review, we will...
April 5 2012
How you can identify and correct abnormal calving positions. That heifer is definitely in labor. Sometimes you can just tell. She is straining and looks uncomfortable. Plus, there has been little progress...
April 5 2012
Learn what you can about calving now before it is too late. Two clean, white tips of hooves are peaking out of the rear end of your 4-H heifer. Soon, a pink nose starts to come. It is her first calf, and...
April 5 2012
Traditionally, bull fertility is difficult to evaluate in the laboratory, although many attempts have been made to assess differences among bulls. Part of this difficulty exists because sperm are exposed...
April 3 2012
Tweaking synchronization protocols with GnRH, CIDR, or through Double Ovsynch all boosted pregnancy rates. This past summer researchers from around the world met in Montreal, Quebec, Canada at the joint...
April 3 2012
Since the advent of A.I. synchronization programs in the early 1990s, many producers now use reproductive hormones to manipulate the estrous cycle of cows in order to time ovulation and insemination and...
April 3 2012
Last month I shared with you an alternative Presynch program, G-6-G (October 10, page 620). It was suggested as an alternative to the standard Presynch protocol described in that article. A new permutation...
April 3 2012
He is a business development manager with Cargill Animal Nutrition Consulting Services. I had two cows abort last week. What do you suppose is going on?" That question comes up several times a year
April 2 2012
Activity-based computer system makes heat detection faster, easier, and more effective than anything we've done before. Cows begin wearing the collars at about 30 days in milk. After they have been confirmed...
April 2 2012
by Jeff Stevenson The author is professor of animal sciences at Kansas State University, Manhattan. Timed A.I. breeding programs have become very useful to dairy producers for a number of reasons, especially...
March 30 2012
Bulls don't do it better. With today's poor farm milk prices, everyone is looking for ways to cut costs to survive. Often, that search leads one to believe that abandoning A.I. breeding might save money...
March 30 2012
Questions from our readers . . . What are current dystocia and stillbirth rates among Holsteins? Have there been any comparisons between sexed and conventional semen? S.H., New York We looked at 10.8 million...
March 30 2012
One of the most valuable resources on any dairy is the replacement heifer. As a group, they represent the most fertile population of females on the farm. In addition, if your sire selection has been wise,...
March 27 2012
Last month, we looked at the value of getting more cows pregnant earlier in lactation and reducing overall days open. Reducing days in milk for all cows in the herd results in greater profits. Let's look...
March 27 2012
The technology to produce sexed semen has been around for decades. But, it was not until recently that commercial application became a reality. We know that the sex-sorting technology can reliably raise...
March 27 2012
Use of gender- or sex-sorted A.I. semen continues to grow rapidly among U.S. dairy producers, even though the technology is still in its relative infancy. The first limited commercial distributions of...
March 27 2012
In the 1980s, a breakthrough in semen sexing technology was made by USDA researchers in the Lawrence Livermore Laboratory in California. The patents for this technology were licensed to a company named...
March 10 2012
Historically, cows with poor dry matter intakes, negative energy balance, or poor health due to fresh cow problems caused by ketosis, milk fever, displaced abomasums, dystocia, retained placenta, or uterine...
Feb. 10 2012
Reestablishing estrous cycles after calving has been studied since the 1920s. Back then, Sir John Hammond of Cambridge made some of the first recorded observations in dairy cattle