Synchronizing Estrus Need cycling cows! Methods Luteolysis Progestagen Destroy Corpus luteum Progestagen Artificial corpus luteum

Synchronizing estrus Methods Luteolysis Progestagen Destroy corpus luteum Beef Dairy Progestagen Artificial corpus luteum

Magic Cows

Magic herd of 21 cows with each cow on a different day of the cycle 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Magic herd of 21 cows with each cow on a different day of the cycle

Magic herd of 21 with each cow on a different day of the cycle 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 Magic herd of 21 with each cow on a different day of the cycle 5 days later Luteal

Single Injection system

One Injection Estrus in 3 days Luteal Breed 1 2 8 3 9 4 10 5 11 6 12 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Breed 8 9 10 11 12 13 14 One Injection Breed Estrus in 3 days Breed Luteal Breed Breed Breed Breed Breed Breed Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed

Double Injection System

One Injection 11 days later Second injection Estrus in 3 days Luteal 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 11 days later Second injection 11 12 13 14 15 16 17 18 8 7 9 10 Comes into heat and Breed Comes into heat and Breed One Injection Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Estrus in 3 days Comes into heat and Breed Comes into heat and Breed Luteal Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed Comes into heat and Breed

Costs - Assumptions Number of cows 100 Palpation per cow 3 Lutalyse cost 3.15 Heat detection costs - 2hr per day $ per hr 5 Semen and breeding cost/cow 35 GnRH cost 7.3 CIDR 8.9   Assume Pregnancy rate = 50% Heat detection = 2 hrs/day for 5 days and is 100% Round up labor fixed for all systems

Single Injection System Costs Single Injection System   Lutalyse 315 Heat detection 50 Semen and Breeding 1505 Cost/Preg 43 No. preg

Costs Double Injection System Lutalyse 630 Heat detection 100   Lutalyse 630 Heat detection 100 Semen and Breeding 3500 Cost/Preg 85 No. preg 50

Finished!