Conception & Fertitlity

Resistance to heat stress is under genetic control

One of the major factors limiting optimal production and profitability in Florida is heat stress. During the summer, cows experience declines in milk yield of 15 to 20 percent and reduction in conception rate to values as low as 10 percent. Recent research supported by the Southeast Milk Inc. Dairy Checkoff Program indicates that a cow’s ability to regulate its body temperature and prevent the negative effects of heat stress on cow function is determined in part by its genetics. What that means is that it should be possible to select cows genetically that are more resistance to the effects of heat stress. FULL STORY »

Analyze the economics of your dairy’s reproductive program

Quickly, what is the cost-benefit of improving your 21-day pregnancy rate from 15 percent to 20 percent? Not many farmers can accurately answer that off the top of their head. But that information can be critical to your profitability. To help calculate the right response for your farm, check out the “Dairy Reproductive Economic Analysis” tool from the University of Wisconsin, Madison. FULL STORY »

Reducing follicle dominance in timed AI programs

Recent research evaluated the effects of the period of follicle dominance in a timed-artificial insemination (AI) protocol and its effect on conception rate in 4,098 dairy cows. FULL STORY »

Johne’s disease has a negative influence on reproduction

The effect of Mycobacterium avium ssp. paratuberculosis (MAP) on dairy reproduction and culling is among the least documented cost attributed to this infection. Research published in the August 2010 Journal of Dairy Science offers some insight to this influence. FULL STORY »

New strategies for heifer reproduction

A significant aspect of proper heifer rearing is good reproductive management. At the 2010 Dairy Cattle Reproduction Council Annual Meeting in St. Paul, Minn., Ricardo Chebel, assistant professor at the University of Minnesota explored new strategies available for reproductive management of dairy heifers. FULL STORY »

The effects of supplemental fatty acids on uterine health, metabolic responses, reproduction and milking performance

The objectives of the study were to evaluate the effects of timing of supplementation of different calcium salts of fatty acids on metabolic status, uterine health, pregnancy, pregnancy losses after two breedings and milk yield. FULL STORY »

AI teaching tool available

This CD is a good first step in learning the basics of the insemination process and would make a nice addition to your dairy’s reference and training library. It is available in English and Spanish versions and offers an overview of the tools and procedures needed to understand artificial insemination in dairy cows. FULL STORY »

High production, low fertility? Tips to improve conception rates

Over the past 30 years, as production has continued to climb, conception rates have been moving in the opposite direction. FULL STORY »

Cows with twin pregnancies experience increased embryo, pregnancy losses

That’s what a new study at the University of Wisconsin – Madison concluded. The study evaluated the factors influencing pregnancy loss for cows diagnosed with twin or single pregnancies. FULL STORY »

Reproductive decision-making widgets

These new tools can help you make better reproductive management decisions on your dairy. FULL STORY »

Monitor days to conception

Extended days open can have lingering negative effects on cow health and culling status. FULL STORY »

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