Lecture 1 Flashcards
What is anovulation
Cows w/ a calf that doesn’t start cycling
Trends for decking dairy fertility
Anovulation
Reduced fertilization
Embryonic survival
Embryonic survival
In women: 40-60% of embryos lost before birth
In dairy cows: 36% lost between d19 and d62
Milk yield v. Fertility
Milk yield has been increasing while pregnancy rate has decreased.
Has started improving again
The dairy cow cycle- how long are they in milk/dry?
In milk: 340 days
Dry: 60 days
How long is the dry period?
60 days
How long is the transition/ waiting period?
3 weeks
How much time is spent waiting to breed?
50-80 DIM
How long are cows pregnant?
283 days (~9 months)
Dairy issues?
-negative energy balance
-metabolic disorders
-adequate health
-heat stress
-heat detection
-open?
-early embryo mortality
Beef logistics- fewer opportunities for managing cattle
-labor
-time
-stress
-geographic limitations
