We recently purchased an 18 yr old mare, 12 foals in the past - all resulted from pasture breeding. Last foal was 2007. Put ALOT of groceries on her before even thinking of pre-preg. workups and breeding. Negative culture/cystology last month. I am thinking she might have still been in a transitional period: U/S when culture done, 35 (Tues) - appeared out on Sat. Were going to short cycle her that next Fri, when she started to act like she was coming back in on Thurs (one week after the U/S) - U/S again and 40. Vet said breed her Fri at the latest. Now this mare has only been pasture bred in the past, and has managed to have 12 foals - so SOMETHING has worked! She teased on Fri (and was bred via AI as she really wanted nothing to do with the stud). HCG on Fri at breeding. Teased Sat, teased hot hot on Sun and collected and AI again. U/S Tuesday and had ovulated (right side), but had a 30 ish follicle on the L side. U/S today and no pregnancy but does have 25 follicle. Plans are to re-check Thursday, another culture, U/S and tease. Leave her at the vet clinic so they can follow her and try to figure out the BEST time to breed, since she really could care less about the whole thing! I will drive over and hopefully pick up a collection for the vet to AI her. And HOPEFULLY be pregnant! Everyone do the pregnancy dance please Guess my question is; has anyone else dealt with mares ovulating so many folicles a week or so apart? Without any drug intervention. This is what I get for only breeding once ever 3 - 4 years! You forget everything!! Any thoughts would be greatly appreciated!!
Jan Owen Senior Stallion or Mare Username: 1frosty1
Post Number: 1515 Registered: 04-2006
Posted on Wednesday, May 07, 2008 - 10:20 am:
Amy....Doing the pregnancy dance for you.......Hopefully Jos will chime in here with the expert answer!
All mares can, and do, produce follicles during diestrus (the period when they are not in "heat"), and in some cases ovulate on those follicles. It's why we cannot (should not) rely on follicular presence alone as an indicator of the correct time to breed.
Note that the fact that she has "managed to have 12 foals" in the past is in fact from your perspective a bad thing. I liken the uterus to a tire on your car. If it's 10 years old and has only travelled 5,000 miles then there's probably still plenty of wear left in it, but if it's 1 year old and has travelled 100,000 miles it's probably worn out. Talk to your vet about the use of an oxytocin protocol (follow that link) - she's a likely candidate for needing it.
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