justintime
Well-known member
Has anyone ever heard of putting CIDRs i nto recips after the embryos has been implanted? I have a friend who tells me that some ET vets in Eastern Canada are doing this and they are having much higher pregancy rates. He said they are leaving the CIDR in the recip as long as possible, some until they drop out themselves ( I am not sure how long this is, but it sounds kinda gross!) Apparenty they are having as much as 20- 25% higher pregnancy rate. I would be interested in hearing if anyone else has heard of this?
As for re using CIDRs, I use them twice and sometimes 3 times.... but I live in Canada. I wrote about this once before on here, in regards to an experient I did several years ago using CIDRs for a 3rd time. A reproductive vet at teh U of S told me that they vused CIDRs at least 3 times and were going to try using them a 4th time. I had kept 10 May calving cows home to keep the grass down around the feedlot for part of the summer. I put CIDRs in them all that had been used twice previously, and then bred them AI after they were pulled.9 out of the 10, calved in March the following year. One was open in the fall. I have routinely used CIDRs to shorten up the calving season since. It doesn't work with them all, but I have been able to get some good producing cows calving back with the bulk of the herd.
My ET vets tell me to wash them thoroughly in warm water, with a brush. Allow them to air dry , put them in zip lock bags or brown paper bags in a cool dark location. I have heard of some putting them in the freezer, but on my CIDR bags it says " do not freeze" so I have been reluctant to try it. I have also heard that some vet colleges wash used CIDRs in a washing machine and then air dry. I wonder about losing some of the product in them, but I don't know if that is a concern or not.
As for re using CIDRs, I use them twice and sometimes 3 times.... but I live in Canada. I wrote about this once before on here, in regards to an experient I did several years ago using CIDRs for a 3rd time. A reproductive vet at teh U of S told me that they vused CIDRs at least 3 times and were going to try using them a 4th time. I had kept 10 May calving cows home to keep the grass down around the feedlot for part of the summer. I put CIDRs in them all that had been used twice previously, and then bred them AI after they were pulled.9 out of the 10, calved in March the following year. One was open in the fall. I have routinely used CIDRs to shorten up the calving season since. It doesn't work with them all, but I have been able to get some good producing cows calving back with the bulk of the herd.
My ET vets tell me to wash them thoroughly in warm water, with a brush. Allow them to air dry , put them in zip lock bags or brown paper bags in a cool dark location. I have heard of some putting them in the freezer, but on my CIDR bags it says " do not freeze" so I have been reluctant to try it. I have also heard that some vet colleges wash used CIDRs in a washing machine and then air dry. I wonder about losing some of the product in them, but I don't know if that is a concern or not.
