Reproductive Management

Treating dairy cow infertility with intrafollicular insemination

Low fertility in dairy cattle has prompted new research evaluating intrafollicular insemination (IFI) as an alternative to common artificial insemination (A.I.) practices. IFI is based on direct introduction of sperm to a pre-ovulatory follicle. FULL STORY »

Help to sort through synchronization protocols

It can be a challenge to keep the various synchronization protocols straight in your mind, let alone successfully implement them on your dairy. To help you and your management team more effectively manage your farm’s reproductive performance, a group of dairy reproductive experts have created a dairy synchronization protocol fact sheet. The two-page document outlines established synchronization protocols, making it an excellent resource tool for your reproductive toolbox. FULL STORY »

Use behavior to determine stage of estrous cycle

Researchers in Norway recently completed a study evaluating behavior associated with standing estrus in lactating dairy cows, in addition to the behavioral changes during a complete estrous cycle. The research was reported in the March 2011 Journal of Dairy Science. FULL STORY »

Time to review sire selection criteria

Updated genetic evaluations for dairy cattle were released in early April, 2011. Now is the time to review selection criteria for service sires. FULL STORY »

Transition heat stress

Heat stress on dairy cows is always a concern. It can be extra discomforting to cows “in transition” during those three or so weeks ahead of calving. FULL STORY »

Reproduction analysis: Can you afford to skip it?

“If you don’t know where you’re going, any road will get you there.” That statement has clear application in any business and shows the management team if they are moving towards or away from their goals. FULL STORY »

Still manually tracking cows in synch programs?

If you still manage your herd’s dairy records by hand, be aware that computers can make your job easier. FULL STORY »

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 »

Adjustments to all cow PTA's coming next month

Beginning with the April 2011 genetic evaluations, USDA-AIPL will adjust the PTAs on all Holstein, Jersey and Brown Swiss cows, whether genomic tested or not, to make all evaluations more directly comparable. FULL STORY »

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