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Breeding a lactating mare

Equine-Reproduction.com Bulletin Board » Breeding Problem Mares - Volume 2 » Breeding a lactating mare « Previous Next »


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Cassandra Jo
Neonate
Username: Fzybtfrm

Post Number: 1
Registered: 06-2009
Posted on Monday, June 08, 2009 - 02:02 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I bred an 8 year old mare to my Friesian stud last year and in april 09 she popped out a lovely foal, no problems. The mare-owner's vet is not a repro specialist, and missed the pregnancy( I'm not sure at what point she was checked).The mare-owner wanted to re-breed, so brought mom and baby back when the foal was three days old.The mare duly came in heat and we re-bred her about three days in a row. Again, the vet says she is not pregnant. So what would be our next step- ultrasound and draw blood to see if she is still ovulating or in lactation anaestrus? If in anaestrus are we out of luck for this year? And if still ovulating, how can we bring her in while lactating?Thankyou for any help- my vet apparently is too busy to call back and answer these questions!
 

Jos
Board Administrator
Username: Admin

Post Number: 2477
Registered: 10-1999
Posted on Tuesday, June 09, 2009 - 10:00 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

we re-bred her about three days in a row

Small but important point... unless you are dealing with a stallion with fertility issues, there is no need to breed on consecutive days, and in fact that can be detrimental to pregnancy rates as it has the potential to introduce more contamination into the uterus. Breeding every other day is adequate.

So what would be our next step- ultrasound and draw blood to see if she is still ovulating or in lactation anaestrus?

I'm presuming this question arises because the mare has not come back into estrus? Given the history, the first thing I would do would be repeat the ultrasound, preferably using another vet for a second opinion. If the mare is truly not pregnant, then run blood-progesterone assays to determine those levels, and if they are >1 ng/ml you can presume that she has an active CL present, and is therefore cycling but silently. If that is the case, use of close monitoring by ultrasound is warranted, or probably a more expeditious and cheaper alternative is to use biorelease altrenogest or P&E from BET Pharmacy which will pinpoint your estrus and make it easier to get the timing right (you will still need ultrasound to identify breeding/AI timing, but fewer).



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