foal heat

AndyPandy

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Foal heat is a useful time to cover. It is acheived with varying degrees of success, and occurs between day 5-13 (I think those are accurate ranges). However, it is often best to delay foal heat, using hormonal manipulation... for the following reasons:

If one considers the insult that the uterus in any species receives during pregnancy, the fact that a mare is able to conceive, and then successfully maintain a pregnancy as soon as a week after foaling is incredible! The newly conceived conceptus does take 5 days to make it's way into the mare's uterus, (conception takes place in the oviduct), so there is already an additional five day "break" after the mare ovulates, but studies have shown that the pregnancy rate in mares that ovulated more than 10 days post-partum is higher than those that ovulated before that time. If one considers how rapidly the mare's uterus can recover a couple of extra days before ovulation can make a big difference, so obviously the answer to "why delay foal heat?" is to allow a little longer for the uterus to recover from foaling.

It should be considered though, that if one wishes to successfully breed on the foal heat, then the foaling must have been without any complications, such as dystocia, retained placenta, tears etc., and there should be very little, or no evidence of fluid within the uterus (such fluid may require additional attention).

It is also recommended that there be no obvious abnormalities of the placenta (which could suggest issues related to placentitis, and hence a pathogen in utero); no discharge by about day 7 post foaling, or at the worst only minor clear or slightly pink discharge; and that the ovulation occur at least 10 days after foaling.

If you want a link to the article about this, PM me.
 

Maesfen

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Last year, Gina, my new coloured, was AI'd by Mel on her foal heat, which was successful but apparently it is quite rare to catch them by AI at this time.
I personally would not like to naturally cover on foal heat unless the mare had had an incredibly easy time foaling so that everything had gone back into place smoothly and cleanly. Many times, mares do not hold then anyway so you might just as well wait a couple of weeks longer to give her proper time to recover. Also, if your mare is travelling to stud, your foal will be that much older and stronger to stand up to the journey and upset to the normal routine if you had waited.
This year, Gina has not held to her foal heat (by AI) and should be covered naturally tomorrow sometime so will be keeping everything crossed - as long as she doesn't!!
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sallyf

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You can cover succesfully but if you are going to do it it is worth putting extra work in to make sure it has as much chance as possible.
We had a NH mare come in and foal mid July last year so no choice really but to try.
We washed her out and extensively used oxytocin to help her uterus return to normal.
She was covered when the foal was 9 days old and it was successful so she is actually due in June this year,
A better way can be to put the mare on regumate for 10 days as soon as the foal is born and supress her foaling heat a little.
On the 10th day pg mare and she will usually be ready to cover within a couple of days as they cpme into season really well and run a lovely short heat.
 
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