Bovine Breeding Management

Question 1

What is the main sign of estrus detection/ in heat in the cow?

Answer 1

She is standing ready to be mounted

- If in estrus, inseminate 12 hours later

Question 2

Why do you want to have a beef bull impregnate a certain number of cows in a certain number of days?

Answer 2

• To get all cows pregnant around the same time which will produce calves at the same time
• Calves will all be the same size –> can be fed ~ the same and sold off together

Question 3

How do you want your bull to impregnate cows in a dairy operation?

Answer 3

-

Question 4

How long do you want your calving intervals to be (time between giving birth)?

Answer 4

15 months

Question 5

How long do you want to milk a dairy cow for?

Answer 5

305 days, followed by a 60 day dry period

Question 6

How long is the cycle in the cow?

Answer 6

21 days

Question 7

How long is the voluntary waiting period in the cow?

Answer 7

60 days

• The period between giving birth and rebreeding

Question 8

What is a gomer bull?

Answer 8

• A new track is tunneled for the penis, causing it to divert to the side and not allowing it to enter the cow

Question 9

What is the difference between control and synchronization?

Answer 9

• Control = procedures that hasten or delay the onset of estrus
• Synchronization =

Question 10

What are some ways you can synchronize the estrus cycle in cows?

Answer 10

• Progesterone injection

- CIDR placement

Question 11

What would happen if you put a CIDR in a cow with estrus?

Answer 11

• The cow will go into diestrus

* ** Check this one bc its probably wrong

Question 12

What is an advantage of follicular synchronization? Disadvantages?

Answer 12

• Giving GnRH indcues a synchronous emergence of a new follicular wave
• Allows cows to undergo a timed artificial insemination
• More expensive and labor intensive though