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  • PRID?

    progesterone releasing intra uterine device. Put one in for 7 days, give a shot of prostaglandin on the 6th day. You expect them in season 5-7 days later.

    I just read this on FB - the poster works at a TB breeding farm. I've never heard them mentioned here, so obviously I don't believe they exist Do we have them in the US?

    They sound pretty good!
    Last edited by Molly Malone; Feb. 5, 2013, 09:12 AM. Reason: spelling
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  • Original Poster

    More information - it's designed to work on cattle but works very successfully in horses.
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    • #3
      From what I've read (but no practical experience), it works the same as Regumate but relieves you of daily administration... Also known as CIDR- controlled internal drug releasing device (I think these are more the sponges). It's progesterone vs progesten (Regumate)

      Apparently it allows a quicker oestrus and ovulation post progesterone treatment because it allows natural development of the follicle to continue during treatment. Another advantage may be that the levels of systemic progesterone decline over time, as the hormone from the device is absorbed. Reported intervals of 2-3 days from end of treatment to oestrus and ovulation for PRID and CIDR vs reports of 8-10 days on Regumate. Downside is potential vaginitis.

      It's licensed in the US as Eazi-Breed but that's for cattle, not labeled for use in horses. New Zealand have an equine specific Cue-Mare- there's an interesting paper on that if you want to read: http://www.matamatavets.co.nz/wp-con...are%202012.pdf


      • Original Poster

        Thanks! The paper says

        Therefore, this treatment protocol appeared to offer a convenient, economical and reliable method for managing transitional mares

        That's not the same as AHF is it? I wonder what the advantages/disadvantages over BET altrogenest might be (cost wise)? Possibly that you don't need to order a full bottle... but you'd need the vet to do the implant probably.
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        • #5
          The intra-vaginal devices are used all the time in cattle. You can use them in mares, but they cause a really nasty vaginitis that most owners object to. It doesn't seem to cause long-term issues, but with the other products available it doesn't seem worth it.
          Last edited by Hillside H Ranch; Feb. 5, 2013, 02:56 PM.
          Already excited about our 2016 foals! Expecting babies by Indoctro, Diamant de Semilly, Zirocco Blue and Calido!


          • #6
            They are actually vaginal inserts, not uterine


            • #7
              Originally posted by elizabeth Callahan View Post
              They are actually vaginal inserts, not uterine
              Yes, you are definitely correct! That's what I get for being in a hurry...I fixed it.
              Already excited about our 2016 foals! Expecting babies by Indoctro, Diamant de Semilly, Zirocco Blue and Calido!


              • #8
                They are not much used in North America, but are in the UK and NZ.

                The cattle CIDRs, although they work in the mare as far as releasing the correct hormones, have a tendency to dislodge and fall out, hence the development of the CueMare in NZ.

                The P&E combination has merit in synchronizing onset of estrus, but has not been shown to produce as close a synchronicity of ovulation as the injectable form.

                As noted by Hillside, vaginitis and cervicitis are typical sequela of treatment, although they have usually subsided by the time of breeding.

                Hope this helps.
                Jos Mottershead
                Equine-Reproduction.com LLC
                EquineRepro Informational Group