dairy repro Flashcards
when is peak lactation
60 DIM
how long is a cow pregnant in days
282ish
length of voluntary waiting period
60d
when do we want her pregnant by
120 DIM
what are the four components of days open
VWP (60d), heat detection, conception rate, cull rate
how many days does it take for total uterine involution
45d
if AI all cows should be inseminated by what DIM
100DIM in almost all situations
when should we do TAI for the first time that breeding season (DIM)
70-90DIM
what is the number one reason days open is too long
poor heat detection
if a cow is in heat what changes in her walking
in heat cows walk 200-300x more steps
what is heat efficiency
detecting all the ones in heat and not missing some and not breeding them
heat detection accuracy
over detecting and breeding cows that arent in heat
is it better to breed pre or post ovulation if you have to not be on time
late is worse than early. around 16hour window
what is the way to figure out a pregnancy rate
how many cows got pregnant out of the eligible cows in 21 days
what are the only ways to improve pregnancy rate
increase conception rate and increase heat detection (fertility and human detection)
