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Fetus not visible at 155 days

Equine-Reproduction.com Bulletin Board » Breeding Problem Mares - Volume 2 » Fetus not visible at 155 days « Previous Next »


Author Message
 

Summerbrook Farm
Neonate
Username: Sbf

Post Number: 1
Registered: 12-2006
Posted on Wednesday, December 06, 2006 - 11:48 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

My mare was checked at 30, 45, 60 and 75 days and all looked good. We could not see the fetus at 75 days, but everything else appeared to be on track. Mare is on Regumate. Fast forward to the next check at 155 days, still cannot find the fetus. Blood was pulled and everything looks good, indicating a pregnancy. Is it likely that the fetus is still too far down to see it yet? Or could there be a problem even though the bloodwork report was positive? Mare is going back to the vet tomorrow to be checked again; I thought I would ask for opinions and experiences on this board as well. Thanks in advance for any info you can provide!
 

Jos
Board Administrator
Username: Admin

Post Number: 1091
Registered: 10-1999
Posted on Wednesday, December 06, 2006 - 12:21 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

What tests were run on the blood? If an estrone sulfate (or total estrogens) assay was run (which would be the correct assay for pregnancy determination at this point) and it confirmed pregnancy, then the mare is almost certainly pregnant as the elevated estrogen levels come from the fetus itself, so no fetus, no elevated estrogens.

Why is the mare still on Regumate? Take a look at the article about Regumate use - it might give you some interesting insights.
 

Kelly
Neonate
Username: Sbf

Post Number: 2
Registered: 12-2006
Posted on Wednesday, December 06, 2006 - 02:03 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Jos, thanks so much for your input. Yes, we checked estrogens and they indicated a pregnancy. Part of this appointment was to make sure her progesterone and fetal estrogen levels were good, and then to start taking her off the Regumate. This is an older mare who has not had a foal in 12 years, and for this particular breeding the vet wanted her on Regumate til day 150.

The bloodwork looks great - I guess it is just a little confusing that we can't see anything at this point. We are going to check her again tomorrow, at which point she will be at 162 days, and hopefully the vet will feel/see something. I was just curious if not finding the fetus at this point could be a problem, despite good bloodwork.



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