Reproductive Management

Publication explains estrous cycle

The 21-day estrous cycle relies on a handful of key reproductive hormones for successful completion. Use this publication from the Dairy Cattle Reproduction Council to help you train employees. FULL STORY »

Genetic parameters: assessing several traits

A study completed by the University of Czech Republic estimated the genetic parameters for fertility traits and linear type traits in Holstein cows. FULL STORY »

Linking conception rate and level of somatic cell count

The Hebrew University in Israel evaluated the effects of mastitis, determined by the pattern and level of somatic cell count (SCC) around the first artificial insemination (A.I.) on conception rate (CR). FULL STORY »

The effectiveness of synch protocols in grazing operations

New research evaluated presynchronization and resynchronization protocols on grazing dairy cows at first and second service. The study compared the two reproductive methods and their effect on pregnancy rate through a 100-day breeding season. FULL STORY »

DCRC honors dairies for reproductive success

For the third year, the Dairy Cattle Reproduction Council recognized dairy farmers for their ability to achieve impressive reproductive success in their herds. The DCRC Reproduction Award winners were honored yesterday at the organization’s annual meeting in Kansas City, Mo. FULL STORY »

Penn State dairy reproduction drill down tool now available online

The Penn State Reproduction Drill-Down Tool provides a systematic approach to critically analyze the major factors affecting heat detection rate and conception rate so that problem areas can be highlighted and discussed. FULL STORY »

Does early palpation result in pregnancy loss in dairy cows?

Looking at almost 1,000 dairy cows in one study, researchers tried to determine the effect of palpation per rectum by use of 1 or 2 fetal membrane slips for pregnancy diagnosis during early gestation on pregnancy loss in dairy cattle. FULL STORY »

Back to basics: Explaining the estrous cycle

A working knowledge of the dairy cow’s estrous cycle and its associated hormones can help you improve your herd’s conception rates and boost reproductive efficiency. FULL STORY »

DCRC annual meeting to feature roundtable on activity monitoring technology

The 2011 DCRC Annual Meeting will include a unique technology session highlighting the industry’s advancements in activity monitoring systems and their benefit to dairy cattle reproduction. FULL STORY »

Ovarian size matters

High variation in dairy cow ovary size and the number of follicles and high quality oocytes in ovaries (referred to as ovarian reserve) impacts ovarian function and fertility. Based on once or twice a day ovarian ultrasonography of cattle, the peak number of follicles growing during different follicular waves of the estrous cycle (referred to as antral follicle count, or AFC) varied seven-fold among animals but was very repeatable within animal regardless of age. FULL STORY »

Prevent a heifer fertility meltdown

Triple-digit temperatures scorched a large portion of the country this summer. Heat stress conditions cause immediate discomfort. However, they also cause long-term consequences on dairy cattle reproductive efficiency. These include a decrease in the length and intensity of estrus, reduced conception rates, decreased embryo survival, reduced pregnancy rates and smaller calf size. FULL STORY »

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