One of our vets is off usually by about 30 days, the other was very accurate. The ones that use ultrasound are much more accurate and ultrasound is what 90% of the dairies here use. They also want to know the sex, especially the reg. herds. For our beef cattle now, we are preg checking way later than we used to since we are not always taking calves off as soon. For several of the places we run cows it is not easy to get the bulls out as soon as I want, but several places I know the exact day the bull went in and came out. I don't preg ck them less than 35 or 40 days, and have found that 60 is better; seems less likely to disupt the preg like at 35.
I want to know preg or not, and if one is alot shorter bred then he will say. If we did ultrasound and we knew that we were having 75% heifers we would probably cry.. :cry2: :cry2: ...bad enough to have 75% heifers anyway. And of the 25% that were bulls last fall, they all seemed to be on the few cows we wanted heifers from.... :cry2: :???: :bang:
I just keep saying better a live heifer than a dead bull.