buckeye
Well-known member
Do you usually have better results on the first flush after calving or better results on the 2nd or 3rd flush
justintime said:I have done a few hundred flushes in the past 10-12 years and I have not been able to see any pattern as to when is the best time to flush. I have had the best flush on the first flush and also have had the best flush on the 10th flush. The last flush we did was a few days ago, on a donor that has been flushed 3 times at 2 month intervals between flushes. The first flush produced 19 grade one embryos and no unfertilized or degenerates. The second flush produced 4 grade 1 and 2 unfertilized and the third flush resulted in 2 grade 1 embryos and O unfertilized. The same sire and the same cane of semen was used in all three. Another older donor was flushed 12 times over 2 years and was becoming very arthritic and the ET center suggested we may have to ship her. They were afraid she would eventually lie down and not be able to get back up. Her embryo production had been falling off and we were only getting 2 or 3 good embryos per flush. We made the decision to send her to town before she had to be put down. The following day, the vet at the ET center phoned me and said he had been reading about a new drug that showed promise with some cows that had this type of arthritic condition and he asked me if I would permit him to try it on her. I agreed and said that seeing she was close to the time she would be flushed again, that maybe we might as well try her one more time. This flush resulted in 17 grade 1 embryos, the most she had ever produced in her flush history. That was almost 3 years ago now. This was our Prairie Lane Sparkle cow and she is still here at nearly 16 years of age and is still being flushed. She looks better now than she did when she was 9 or 10 and has had no issues with arthritis since she was treated. She walks a little slower now, but I also walk slower than I did when I was 20. At 15.5 years, she is still one of the fattest cows in our herd and was wintered on only hay. I am wondering if I was to threaten my donors with a trip to see the " Golden Arches" if that may work to get them producing more embryos.
The best embryo producer we have ever had produced 328 embryos from 12 flushes also done at 2 month intervals. She averaged 28 embryos per flush and the last flush we did was the smallest one and only produced 8 grade 1 embryos. She was brought home to rest for awhile and was bred 5 days after her last flush and produced twin heifers the next spring. She is also still here and will calve any day again.
If I could ever figure out a pattern as to which flush will be the best, I could probably make a small fortune, but it is basically a crap shoot every time you flush.