when is it normal for an hCG shot to be given when breeding via fresh cooled? This time around my vet gave the shot about 36 hours before she was AI'd, which none have ever done before in my past experiences. And this is the first time I have not had one catch.
Around 90% of mares will ovulate 36-42 hours after receiving hCG in the face of a 35 mm follicle. One method of use therefore is to give the hCG in the manner your vet did this time - this is especially beneficial if there is any possibility that the semen is not going to be of the best quality, as it means that the mare will ovulate at almost the same time that she is inseminated. The drawbacks are that if there is a follicle that reacts faster than 36-42 hours, or if the semen gets lost, she may ovulate too soon. There is a huge list of reasons why mares do not get pregnant, so the chance that the problem was related to the timing of the hCG injection is probably quite small.
I was kind of confused as to why they gave it, since the previous day we were hoping she would hold on long enough to get the semen here. I also have no ultrasounds on my bill that were done the day before or the day of breeding, nor do they seem to be able to tell me how big her follicle was, etc. They also can't produce any paperwork regarding the culture that was done, or any paperwork regarding the quality of the semen when it arrived. All they had to give me was a receipt and a copy of the labwork from when the semen left the stallion owner's clinic.
I've never had a clinic do things like this, and I'm just left wondering what the heck happened. No one seems to be able to give me any definite answer about anything that went on or why.
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