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Breeding protocols

Discuss all kinds of problems encountered in breeding mares from not standing for live cover, through to not getting pregnant for unknown reasons!

Moderator: Jos

Breeding protocols

Postby Damrock Farm » Thu Jun 12, 2014 5:41 pm

I have a mare here, foaled 4/23/14. TB, requiring live cover. We bred her on the foal heat, hoping to bump her up a bit for next year. She had a 35mm follicle the day (26 hours) before breeding and ovulated the day after, but didn't take. Sent her back the second time, clean culture, 35mm follicle 28 hours pre-breeding. Again, she ovulated by the next morning and again, didn't take. Third trip, we checked her on Monday evening (6pm) for a Wed. 9am breeding and she was 2.8, which would have most likely put her at least at 35 by Tuesday. We did the check on Monday night so that we had time to complete the required culture before Wed morning. We did not check her again on Tuesday. Bred her at 9am on Wed morning. Checked her for ov this afternoon and she has not ovulated yet. Called to set up a double and the stallion manager is refusing. He claims we should have rechecked her Tuesday before sending her. I feel that based on her history, it was a safe bet that with a 28mm follicle on Monday evening, she would have ovulated today. She was checked 43 hours pre-breeding. In the last two cycles, with a 35mm follicle just over 24 hours pre-breeding, she ovulated before the check the next day. Stallion manager says he won't breed her tomorrow because we didn't check her on Tuesday. Thoughts?
Damrock Farm
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Re: Breeding protocols

Postby Jos » Thu Jun 12, 2014 9:41 pm

What did the cytology smear show? There was a cytology smear prepared that supported the "clean" culture result wasn't there? Without one, the culture results are meaningless... see our article about the importance of a cytology smear for more details.

Average follicular growth is 3-5 mm per day, so if a mare has a 28 Monday evening, I would anticipate a 31 on Tuesday through the day, with maye a 33 by evening. If she had been given a GnRH product at that point (Monday), she might have ovulated by Wednesday.

If you can give more details, we might be able to offer some additional suggestions.
We're always happy to try and help, but don't forget to check the articles section
of the website too, which has a search engine to help you look for answers!
:)
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Jos
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