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Discussion on Small organ looking thing in sack
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Posted on Monday, Apr 29, 2002 - 1:23 pm:
When my mare was foaling last night, when the sack broke open a funny looking little rubbery thing fell out. I'ts liver colored and about 2 inches wide and 3 inches long. Do you know what it could be?
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Posted on Monday, Apr 29, 2002 - 7:13 pm:
Could it have been the foal's hoof cap?
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Posted on Monday, Apr 29, 2002 - 7:15 pm:
Ah, the wonders of the hippomanes! Good luck on getting any answers to this one! It has stumped equine professionals too! You are not alone!
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Posted on Tuesday, Apr 30, 2002 - 6:15 am:
Hello David and all,
Capped moonstones or hippomanes, these are normal though I do not always find one with every placenta. As B. says there is some argument about exactly what it is. I cut this from one of the articles referenced on our search engine:
Often a brown "liver-like" material, termed a hippomane, is found floating in the allantoic cavity. Dr. Jim Rooney theorizes that the hippomane arises as an out-pouching of the allantois which eventually forms a pedicle and separates to float free in the allantoic cavity. Other references suggest that it is a collection of debris, thought to be deposits from the foetal urine and cells. Histologically, it appears to be a concentric deposition like a urinary calculi. I have also heard this called a moonstone.
DrO
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Posted on Tuesday, Apr 30, 2002 - 3:24 pm:
Thank you all much for your responses. She was my third to foal this year and the only one that I happened to see this thing. At least I know it's nothing to worry about.
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