Repro 5 - Reproductive Technologies

Question 1

What are some common drugs used in cow repro

Answer 1

-Prostaglandin (PG)
-GnRH
-CIDR
-Estradiol 17B
-FSH

Question 2

What are some benefits of synchronization? (there’s a lot, just think of like 3)

Answer 2

• Increase the number of heifers/cows bred early in the breeding season
• Increase profitability from early calving cows, calf crop uniformity, and heavier
  calves at weaning
• Increase longevity of females in your herd
• Increase in days postpartum which promotes better breed back of females
• Increase the total number of females bred through increased opportunities to
  become bred
• Increase value of replacement females created
• Decrease the number of bulls and facility space needed
• Decreased calving season, thus shortening the labor and time needed

Question 3

What is CIDR and what does it do?

Answer 3

An intravaginally inserted device that releases progesterone for a 7 day period. After 7 days, it is removed and estrus is stimulated. USED FOR SYNCHRONIZATION

Question 4

What is the schedule of hormones being administered in an embryo DONOR?

Answer 4

Day 0: Estradiol 17B and CIDR implant
Day 4: FSH (2x a day for 4 days)
Day 8: Remove CIDR and PG
Day 9/10: GnRH + AI (breed)
Day 16: Flush/Process embryos/Freeze/Implant

Question 5

What is the schedule of hormones being administered in an embryo RECIPIENT?

Answer 5

Day 0: Estradiol, GnRH + CIDR
Day 7: Pull CIDR and PG
Day 9/10: GnRH + AI (breed)
Day 16: Implant

Question 6

What is the goal of using these repro technologies?

Answer 6

-Recipients will be reused
-Implant as many embryos as possible
-Reduce times through the chute