Quote:
Originally Posted by Kriss2004  On average, how many days into pregnancy does the mare foal? Right now Cheyenne is at day 339. Her belly is starting to drop, croup is softening, and udder is almost full of milk. We have a string of storms the rest of this week and I can easily see her foaling this week/weekend. What do you think? I will get some pics to post tomorrow. |
The equine is unique in mammals in that the fetus determines gestational length, not the mare. Average length of gestation is from 320 to 370 days. 340 is given as the "average" length of gestation, but it is indeed an average of averages. A mare is not considered overdue until she hits 370 days. And, a variety of things can influence gestational length including weather, illness, lack of feed, abundance of feed, time of year, age of mare, placentitis, etc. Inducing the pregnant mare is rarely recommended as well. There are very specific parameters that must be in place before it is recommended to even consider inducing labor.
Hope that helps.
Kathy St.Martin
Equine Reproduction Short Courses
Equine Reproduction 
03-20-2007, 05:45 PM
... a horse is a thing of such beauty... none will tire of looking at him as long as he displays himself in his splendor. 
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