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Reproduction

A thorough understanding of cattle reproduction, whether its pregancy or calving, can help producers improve livestock practices and potentially boost overall production.

Topics:
Pregnancy
Calving
Reproductive and Nutrition

Pregnancy

Last Trimester of Pregnancy
Alberta Agriculture and Food
Tips on managing a cow's last trimester to produce strong, healthy calves.

Physiology of Pregnancy
Alberta Agriculture and Food
The physiological intricacies of pregnancy: fertilization, cleavage, implantation and gestation.

Functional Anatomy of the Female Reproductive System
Alberta Agriculture and Food
The terminology, anatomical location and functional anatomy of the important components of the cow's reproductive system.

Female Hormones of Reproduction
Alberta Agriculture and Food
The hormones that regulate reproductive function in female cattle.

Calving

Calving Systems
Ontario Ministry of Agriculture, Food and Rural Affairs
Are the innovators of calving and production systems better off than those who use tried and true methods? A 2002 study gave some intriguing answers to this question.

Calving
Alberta Agriculture and Food
Techniques and background to help producers solve problems with the calving process.

Calving Emergencies in Beef Cattle: Identification and Emergencies
Virginia Cooperative Extension, Virginia State University
In three different studies, calving difficulty, or dystocia, was the highest veterinary cost to cowcalf operations in Colorado, California, and Tennessee. Dystocia is also the number one cause of calf mortality in the first 96 hours of life. Lower the risk of dystocia by developing a sound management program. (PDF)

When Should I Calve My Cows?
Manitoba Agriculture, Food and Rural Initiatives
According to this factsheet, producers often ask two important questions: “Should I switch my calving season to spring or summer? and “Why not fall calving”? While these might seem like easy questions to answer, they are not.

Pasture Calving Means Profits
Ontario Ministry of Agriculture, Food and Rural Affairs
"When you add up the dollars," says the author of this report, "summer calving wins hands down compared with a traditional production system in Ontario. That's the bottom line from a (2003) long term study at the University of Guelph."

Reproduction and Nutrition

Effects of Nutrition on Beef Cattle Reproduction
Alberta Agriculture and Food
Nutrition influences the reproductive performance of cattle in a big way. As this factsheet points out, “producers must be aware of daily changes in a cow's feed requirements if they want to wean calves from at least 90 per cent of cows exposed to the bull."

Feeding of Young Beef Bulls Can Influence their Reproductive Capacity
Alberta Agriculture and Food
Comparing the effects of high and medium energy diets of young bulls on their reproductive capacity.

Feeding to Maximize Reproductive Performance of Your Cows and Heifers
Manitoba Agriculture, Food and Rural Initiatives
Proper nutrition saves on feed costs and maximizes the reproductive performance of breeding herds.

Moldy Feed and Reproductive Failure in Cows
Alberta Agriculture and Food
Mycotoxins, resulting from the widespread presence of fungal spores in feed, can reduce and inhibit animal health and productivity.

Make or Break: Cow Nutrition Pre- and Post-Calving
Ontario Ministry of Agriculture, Food and Rural Affairs
"Beef cows need little babying," as the author of this factsheet points out. One major exception, however, is the period just before and after calving.

Mineral Supplementation for Cow/Calf Pairs
Virginia Cooperative Extension, Virginia State University
Producers should obtain assistance with mineral supplementation, according to this factsheet.

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