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Home → Articles → Reproduction
It you are looking for information pertaining to animal reproduction, artificial insemination, in vitro fertilization, culling for fertility, or maintaining your herd bulls, this section has what you are looking for.
Research Identifies Method To Remove Faulty Sperm From Artificial Insemination Process
published: May 21st 2012 by: Peter Sutovsky source: University of Missouri
COLUMBIA, Mo. – All bull semen is not created equal, but Peter Sutovsky has found a way to level the bovine-fertility playing field. Research from the University of Missouri reproductive scientist identifies faulty sperm and takes them out of the equation for artificial insemination (AI) of cattle....
Comparing PG 6-Day CIDR and 5-Day CIDRs
published: May 15th 2012 by: Dr. George Perry, with contributions fro source: South Dakota State University Extension
It seems like every day we are learning more about the best ways to artificially inseminate cattle. New protocols appear to pop up daily, but as a producer, who is to say which protocol will give the highest pregnancy rates? Researchers at South Dakota State University put this question to the test by subjecting a group of postpartum beef cows to two commonly used fixed timed AI protocols; the PG 6-day CIDR program and the 5-day CIDR program, to determine which protocol resulted in a higher pregnancy rate....
Make Sure Your Bull Is Ready
published: May 14th 2012 by: Kris Ringwald source: North Dakota State Extension
We are are prime bull turnout times in the beef business, so the final check needs to be done now to make sure every bull is ready to go. The beef business depends on buying fertile, productive bulls that pass on the desired genetics to their offspring and meet the consumers’ demand for beef....
Shorter Calving Season Leads To Greater Efficiency
published: May 4th 2012 by: Mark Keaton source: Arkansas Extension Service
Managing the cow herd to calve in 75 days is one of the most important steps toward increasing efficiency and profitability. Time and labor are very important and expensive commodities for a cow-calf producer....
Reproduction Equations Discussed
published: April 26th 2012 by: Jim Krantz source: South Dakota State University Extension
Fertility is influenced by many factors, and one of the best methods to look at the factors is with the “Equation of Reproduction”. The Equation of Reproduction includes the following 4 areas: 1) Percentage of animals detected in standing estrus and inseminated, 2) Inseminator efficiency, 3) Fertility level of the semen, and 4) Fertility level of the herd....
Setting Your Replacement Heifers Up For Success
published: April 11th 2012 by: Dr. Jim White and Mike John, with MFA
The goal for selecting replacement heifers is simple—you want them to conceive, calve early in the calving season, provide adequate milk production and produce a calf every year. But much of what makes a good replacement heifer begins long before you begin to eye the keepers....
Lack Of Fertility In Cows Linked To Mysterious Male DNA
published: March 29th 2012 source: American Society of Animal Science
The genomes of cows that have difficulty reproducing often contain fragments of the male Y chromosome, according to a new study in press in the Journal of Animal Science. The researchers say this finding could help cattle producers identify subfertile females before investing time and resources on breeding attempts....
Sexed Semen Could Be Important Tool In Rebuilding The Nation’s Cowherd
published: March 19th 2012 by: Howell Medders source: Farm Talk
The number of cattle and calves in the United States has dropped to the lowest level since the 1950s, according to the U.S. Department of Agriculture. Mike Looper, head of the Department of Animal Science, University of Arkansas System Division of Agriculture, said beef producers have been selling cattle in response to record high beef prices and near record costs of production, especially feed and fuel....
Beef Breeding Programs Help Producers Capitalize On Strong Prices
published: March 2nd 2012 source: Purdue University
Artificial insemination breeding programs can help cattle producers capitalize on prices that are at an unprecedented high, a Purdue Extension beef specialist says. While many cow-calf producers shy away from artificial insemination because of the extensive management requirements, Ron Lemenager said incorporating an estrous synchronization program into the breeding plan can reduce time spent detecting estrous and increase the number of cows bred in the first week of the breeding season....
Breeding Soundness Exams Are Important
published: February 13th 2012 source: Purdue University
Examining bulls for reproductive soundness is important as breeding season approaches, says a Purdue Extension beef specialist. Veterinarians specializing in reproduction typically perform the exams. They evaluate physical soundness, reproductive organs and semen quality and offer beef producers a chance to determine if bulls have any injuries or conditions that might prevent them from breeding cows in the spring....
Calving First Calf Heifers
published: January 3rd 2012 by: Rick Funston source: Montana State University
"Feeding a balanced ration the last trimester of pregnancy will decrease calving difficulty." What is the optimum pre-partum weight and condition score for first calf heifers? Many calving problems can be eliminated if heifers are of adequate size....
Post Calving Nutrient Requirements For Young Females Are Higher
published: December 29th 2011 by: Rick Ragsby, Ph.D source: University of Nebraska
The 1996 Nutrient Requirements for Beef Cattle indicates that the first-calf-females post-calving needs to consume a diet that is between 62% and 64% TDN and 10% to 11% crude protein, depending on level of milk production....
Pregnancy And Calving Percentages Are Stable
published: November 23rd 2011 by: Kris Ringwald source: NDSU Extension
It often is said that growth is a very bigi trait in the beef busines, but reproduction is an even bigger one. The main point is that the components of reproduction are very hard to pull out and fix. However, the sum of the pieces produces a calf at least 93....
Tune into fetal programming
published: October 28th 2011 by: Kindra Gordon
We’ve all heard the phrase “You are what you eat” – but research in the human health and bovine world is increasingly indicating that what mama eats has a great influence not only on her, but her progeny as well....
Analyzing Calving Intervals
published: September 15th 2011 by: Kris Ringwald
When discussing major changes in the beef cow operation, calving date and cow size quickly come to life. The easiest to change is calving date. Caution and considerable thought need to be used because once chang-ed, an early calving date is not easy to get back....
Commercial Sire Selection: What’s Important and What’s Not
published: September 15th 2011 by: Stephen P. Hammack
Profit or net income from a calf crop of a commercial cow/calf herd is determined by: (number sold X average weight X average price/lb) – (total cost of production). Profit from a commercial herd should be figured in this way, across the total operation rather than on a per-cow basis....
Improving Artificial Insemination Techniques
published: August 26th 2011 by: W. M. Graves and R.C. Smith, Department source: University of Georgia
It is well known that daughters of sires available through artificial insemination (A.I.) produce more milk than daughters of sires used in natural service. Cows sired by proven A.I. sires have been shown to be $148 more profitable in a fluid milk market during their lifetimes....
Arkansas Implements Trichomoniasis Testing At Sale Barns
published: June 28th 2011 source: The Daily Times
Arkansas livestock officials are implementing a new testing program to prevent an epidemic of a sexually transmitted disease in bulls that could threaten the state’s $1.4 billion cattle industry....
Arkansas Taking Measures To Stop Spread of Trichomoniasis In Cattle Herds
published: June 9th 2011 source: Arkansas Extension Service
LITTLE ROCK, Ark. - An emergency regulation aimed at stifling the spread of Trichomoniasis, a protozoal disease that can cause abortion and infertility in cattle, goes into effect June 15, said Tom Troxel, associate head-animal science, for the University of Arkansas Division of Agriculture....
Pregnancy Loss Followed By Infertility Can Impact Production Over A Long Period Of Time
published: June 4th 2011 source: Boehringer Ingelheim Vetmedica, Inc.
St. Joseph, Missouri, June 3, 2011—The U.S. cattle industry has not seen significant changes in the clinical syndrome caused by Leptospira hardjo-bovis (LHB); yet, the disease continues to burden cow/calf producers with reproduction implications that can become costly and widespread within the herd....
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