Day and colleagues calculated that if 5-day CO-Synch + CIDR were implemented with just 10 percent of Ohio's roughly 500,000 beef and dairy cows, the total economic benefit would easily surpass $5 million in savings and increased production.

This protocol is now being studied in dairy heifers and cows by researchers at various locations across the country, Day said. The hope is that this approach will increase fertility in dairy cattle compared to current protocols, giving farmers another tool to inch closer to their animal reproductive goals.

While technology is an important factor in boosting reproductive efficiency of dairy cattle, it's not the solution by itself, according to OSU Extension's Schuenemann.

"There's no magic bullet," said Schuenemann, who develops and coordinates research-based, practical training workshops for dairy producers, personnel and veterinarians throughout Ohio.

"There are many tools out there — from synchronization protocols to heat detection to measuring cow activity — but regardless of the tool a farmer may use, proactive management practices at the farm level matter when it comes to reproduction."

One of the things Schuenemann emphasizes in his training programs is proper management during the transition period, which is three to four weeks prior to calving and approximately one month post-calving. This, he said, is "key to reproductive success."

Some of the issues that dairy farmers need to address during this crucial period include avoiding overstocking of animals and commingling, or mixing together, of mature cows with heifers; making sure cows get balanced feed rations; and having a reliable and well-trained group of workers who can properly handle calving and identify and assist cows that experience difficult births as well as sick cows after calving.

Proactive management also involves choosing the right tool or set of tools to maximize reproductive success.

"The choice of reproduction protocol needs to match the particular conditions of each farm, its resources, its objectives and the skill of its workers," Schuenemann said.

"All dairy farmers are unique, even if they are only a mile apart from each other, so it's very important to assess human resources on the farm. Some may adopt techniques that are more time-sensitive and cost more in synchronization hormones, but which have the potential for higher pregnancy rates."

Others might do better with heat detection and trying to take advantage of normal estrus, he said.

"You don't want a farmer to fail because he picked a technique that doesn't work for his conditions," Schuenemann said. "Every farm is an integrated system; decisions made on one area of the farm will have an impact on other areas of the farm."

Ohio State resources for dairy farmers are available at and