Pregcheck Accuracy

[Alexi Bonifield <alexib@oro.net>]

For three years in a row my vet has prg-checked mares open who turn out 
to be pregnant, with disastrous and costly results. Are there any 
studies published about accuracy of these exams? how responsible can I 
hold this vet? In 30 years of breeding  I have never experienced this 
problem. I'm giving the man exact breeding dates and not having him 
check any mares under 30 days, more likely 45. No, I am no longer using 
him.Thanks, Alexi in N.California