Fertility Flashcards
bull infertility stats
complete infertility - 5-10%
sub fertility - 20%
fertile -
60% in calf in 3 weeks
<10% empty after 9 weeks
cost -
depreciation over time
price and cull value
maintenance - feed, bedding, vaccinations
risk - damage to equipment and cows
causes of bull infertility
poor libido
injury
overwork
nutrition
corpus cavernosum rupture
persistant frenulum
corkscrew deviation
IBR-IPBP
penile trauma
fibropapilloma
testicular hypoplasia
orchitis/epididymitis
seminal vesiculitis
testicular degeneration
systemic illness
BVD
genetic
iatrogenic
divided into -
failure to mount
failure to ejaculate
failure to achieve fertilisation
bull breeding soundness exam
BCS
heart and lungs
eyes
jaw
locaomotion - lameness, conformation, abnormalities
external genitalia - palpation of testes, scrotal circumference, penis
internal genitalia - accessory sex glands
semen analysis -
motility - gross and progressive (% swimming forwards)
morphology - eosin nigrin stain
libido/service assessment
other factors -
maturity - stature
socialisation, introduction, rotation
cow initial obstetrics assessment
local conditions
presentation
foetal maternal disproportion
obstruction
twins
malformation
metabolic - hypocalcemia
submission rate
proportion of eligible animals served in given time
AYR target >60%
submission rate - factors
envinromental -
light
season
space
temperature
flooring
cow comfort
management -
social
time budget
nutrition
operator skills
fertility interventions
cow -
presence of calf
BCS
age
concurrent disease
nutrition
genetics
energy balance
lameness
history
conception rate
proportion served cows pregnant at PD
AYR target 40%
pregnancy rate
proportion of eligible animals pregnant at given time
submission rate x conception rate
AYR target >20%
block calving KPIs
submission >90%
conception >60%
3 week in calf >50%
6 week in calf >75%
12 week empty <8%
heifers
aim to calve by 24 months - so in calf at 15
using heat detection and synchronisation
base KPIs off second lactation
