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Pregnant mare on regumate behaving like a stallion!!??

Equine-Reproduction.com Bulletin Board » Breeding Problem Mares - Volume 1 » Pregnant mare on regumate behaving like a stallion!!?? « Previous Next »


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Charlotte (Unregistered Guest)
Unregistered guest
Posted From: 80.165.186.251
Posted on Wednesday, July 13, 2005 - 12:51 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

My 10 year old mare is 50 days pregnant and on regumate. Her field companion was also pregnant but we just noticed over the weekend that she is showing heat and after a scan monday morning we got the bad news that she had reabsorbed (90 days pregnant). We noticed a change in the (still) pregnant mare last friday; snorting and "yelling" like a stallion. The mare in heat would then stand with hind end up the pregnant mares face and the pregnant mare got even more stallionish! Needless to say we had the still pregnant mare scanned as well Monday morning and everything looked fine! The empty mare was bred again yesterday (after ovulation and with frozen) and returned to the field today. The pregnant mare got completely crazy and tried to mount her.....! Has anyone ever experienced this behaviour in a pregnant mare on regumate? This is our first time using regumate as we cannot get it in our country!!! But this mare on regumate has had problems and a friend brought it over for me and the first time we bred her and put her on regumate she was confirmed in foal!
I would appreciate any response!
 

Charlotte (Unregistered Guest)
Unregistered guest
Posted From: 80.165.186.251
Posted on Friday, July 15, 2005 - 08:36 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Oh my god. Am I really the only one here who is having this problem? I would really appreciate response if there's anyone who has heard or know of this problem. TIA
 

Jos
Board Administrator
Username: Jos

Post Number: 10213
Registered: 10-1999
Posted on Friday, July 15, 2005 - 08:52 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

At certain stages of pregnancy all mares will be subject to hormones secreted by either the mare herself or the fetus. One of the hormones secreted by the fetus - in varying amounts by different fetuses - is testosterone. What you are seeing is a perfectly normal occurrence during some pregnancies. It is not related to the Regumate use, and it is not related to the mare carrying a colt - filly fetuses may secrete testosterone as well.
 

Lisa Weir
Neonate
Username: Pals_pal

Post Number: 4
Registered: 08-2005
Posted on Wednesday, August 10, 2005 - 08:05 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

We have a mare who becomes very stallion like in her late pregnancy. To the point that in the day before she foals, she will seperate the mares in her paddock into groups, and not let them mingle. It's great, because she's totally reliable in this behaviour!
Have also seen many pregnant mares that will even mount a mare in season. Enough for me to say it's not unusual.



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