LN
Well-known member
I'm considering using it on a couple donors. Does anyone have experience with using IVF and what were your thoughts?
LN said:Here's my scenario...
We got back into the registered business a couple years ago and have a couple older cows that have proven themselves over a decade. I want female replacements from these cows. They were bred to the repeat AI so to do conventional ET I would have to freeze the embryos and put them in the following year because the time line wouldn't work with the big synch. And there's no guarantee I'd get the amount of female progeny I want.
This is why I'm investigating IVF.
twistedhshowstock said:I am not sure I understand, are you saying that at this point you would have to wait until next yr to put embryos in? If that is the case then I think I would use traditional flush as the embryos from a traditional flush seem to freeze a little better than the embryos from ET. If you are trying to get as many embryos as possible out of older cows then I think IVF would be an option, but like I said, the TransOva facility here recomends putting the embryos in fresh rather than freezing them when performing IVF because the embryos just dont seem to freeze as well, not to say they wont freeze but conception rates just arent as high with frozen IVF embryos. Another good point is that they can aspirate oocytes from cows even after they are bred, I think it is up to 90 days bred, but may be longer. When aspirating oocytes for IVF they actually bypass the cervix and uterus so it will not damage a pregnancy.