Managing and Monitoring Reproductive Health in cattle 2 (the herd)

Question 1

What si the cost of infertility?

Answer 1

Question 2

What are some essential questions for ferility of dairy herds?

Answer 2

• Do cows get served?
• Are served times correctly?
• Do serves produce preganncies?

Question 3

What is our minimum database for dairy herd?

Answer 3

• Calving dates +/- dystocia & assitance
• service dates +/- sire & operator
• Pregnancy diagnoses

also:
- Fertility tx
- uterine inflammatory dx & RFM
- Abortions

Question 4

Describe the targets for inter-service intervals & submission rates?

Answer 4

Question 5

What is the first service or day 24 day submission rate?

Answer 5

– Proportion of cows that are served within one oestrus cycle of becoming
eligible for service
– A measure of oestrus detection efficiency
– Target 80%

Question 6

What is the return service submission rate?

Answer 6

– Proportion of PD negative cows that are served within one oestrus cycle of
the previous service

Question 7

How to assess if serves are timed correctly ?

Answer 7

-> Inter-service intervals
-> 18-24, 36-48 day returns ratio

Question 8

Describe inter-service intervals

Answer 8

• Temporal distribution of services
• A measure of oestrus detection accuracy
• Are services falling when expected assuming a cycle length of 18-24 days

Question 9

Describe the 18-24, 36-48 day returns ratio

Answer 9

The ratio of the proportion of returning cows that were served at the first
return to those at the second

Question 10

Differentials for Inter-service intervals?

Answer 10

Question 11

How do we assess if serves produce preganncies?

Answer 11

-> Pregnancy rate (UK) or Conception rate
-> Fertility efficiency or Preg rate (US)

Question 12

What is the pregnancy or conception rate?

Answer 12

• Proportion of services that result in a positive pregnancy diagnosis
• Care with synonyms (esp. US preg rate)

Question 13

What is the ferility efficiency or Preg rate?

Answer 13

• Proportion of eligible cows that conceive every oestrus cycle
• (%cows eligible for service conceived – InterHerd)

Question 14

Glossary & targets 1?

Answer 14

Question 15

Glossary & targets 2?

Answer 15

Question 16

What KPIs in Beef suckler fertility?

Answer 16

Question 17

What should BCS be in suckler herds?

Answer 17

Question 18

What three things to assess bull fertility?

Answer 18

• Breeding soundness exam -> General health & reprod tract
• semen (morphology & motility)
• Libido (ability to mount & intromission)