AI technologies

Question 1

Name a synchronisation program

Answer 1

Prostaglandin program
- single PGF injection -> CL regression -> P4 declines -> follicular phase begins
- best in females in oestrus 7-17 days before injection
Pros
- low cost
- minimal handling
Cons
- will not synchronise 100% of herd
- will not work in non-cycling females

Question 2

Progestagen program…

Answer 2

suppreses GnRH -> supress follicular dev. & ovulation
withdrawal -> synchronised oestrus
Crestar - P4 & E2 -> ear implant for 9 days - > heat
- Controlled intravaginal drug releasing device (CIDR) - insert for 7 days then PGF -> heat detect/AI day 8
- Progesterone releasing intravaginal device (PRID) - Y-shaped things used in sheep AI in prac… insert PRID day 0, remove day 12 -> oestrus 1-3 days later