Basically, this is a question about a rumour that I have heard on the effect that PG can have on some mares.
I have a mare, 18yo later this year but has had several foals in the past, that for the past 3 seasons has not retained pregnancies past the first month.
Our vet has recommmended that we use regumate throughout the pregnancy; for logistics reasons it is not feasible for us to do this, so I am close to 'resigning' myself to having her just as a lovely riding horse.
But in a last ditch, grasping at straws type thought... several people have told me that some mares that are PG'd to bring them into season will not retain a pregnancy. If they are served after coming into season 'naturally' they often do retain the pregnancy.
Is there any truth to this rumour at all?
(I should have asked my vet this, but just haven't got around to it!)
I am quite a novice in this area but have always believed that the closest you can stay to nature's way will most often have the best outcomes.
I brought my maiden mare to the stud on her 2nd obseved heat cycle this spring. She stood willingly for in hand breeding x3. I am thrilled to say that on her 60 day check 6/28, she has just been reconfirmed in foal.
Modern medicine is wonderful and essential to "help" when needed. (I have been an RN for >30 yrs and know 1st hand the value of medicine) Horses have been breeding for thousands of years on their own and it couldn't hurt to rely on mother nature...
some mares that are PG'd to bring them into season will not retain a pregnancy. If they are served after coming into season 'naturally' they often do retain the pregnancy.
The mare's own uterus releases prostaglandin at a point in her cycle that causes her to come back in to "heat". Working on the principle of the BS you've been fed, that would mean that no mare would ever get pregnant!
With a mare of the age and parental status that you describe, delayed uterine clearance leading to breeding-induced endometritis ("BIE") is a very great possibility that should be considered, and the use of an oxytocin protocol may be of great assistance (follow that link for details).
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