The Foaling Date Calculator below is based on 340 days of gestation.
You should allow plus or minus 12 days for an actual foaling window.
REMEMBER THIS IS AN ESTIMATE -- YOUR MARE MAY BE
Dates To Remember
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"Normal" foaling dates, typically ranging from 315 to 370 days after
With Miniature Horses averaging 325 to 342.
Udder "Bag" Development
During this time period, the Mare's udder begins development to prepare for the
production of colostrum.
Teats begin to Fill
During this period of time, the udder begins to let colostrum down into the teats
in preparations for foaling.
Waxing of Teats
Due to oozing out of some of the colostrum, the ends of the teats become covered
over and the mare is said to be "waxing", which occurs 1-2 days before foaling.
At this time, some mares will have occasional dripping or streaming of colostrum.
If this streaming is continuous, the colostrum should be collected and stored
for possible use with the newborn foal.
Pelvis and Vulva Relaxation
During the beginning of this period the muscles in the pelvic area (over and
around the mares rump) begin to progressively relax. Nearing the end of the
gestation the muscles in the Mares vulva will begin to relax as well, signifying
the final round of preparations before parturition/birth.
A foaling mare should not be placed in a strange environment or have a stranger
act as night attendant immediately prior to parturition. Any sudden changes may
delay foaling. Ideally, mares should be placed in the foaling environment 2 to 3
weeks prior to her expected foaling date.
Mares can foal in a variety of locations, depending on the weather and
facilities available. Whatever the choice of foaling locations, the environment
should be clean, have adequate space, and be reasonably quiet. Mares due to foal
in the winter months will require a large (10' X 10' minimum), clean foaling
stall. During warm weather, many producers choose to allow their mares to foal
in grassy paddocks or pastures. However, this is not recommended when
un-attended. Dirt lots should be avoided, if possible.
For mares foaling in a stall, the stall should be freshly bedded with clean, dry
hay or good quality, non dusty, shavings. Straw bedding is not recommended, as
many miniatures will eat it and colic. An 4- to 6- inch-thick bedding of hay
will decrease dust, chances of infection, and is easier to clean. Safety to the
mare and foal should be kept in mind when selecting a foaling stall. Stalls
should be constructed to allow isolation of the mare and safety to the newborn
foal. Thorough disinfection of the stall prior to bringing in the mare will help
prevent disease. The mare should be allowed ample exercise up to foaling. Stall
confinement for an extended period just prior to foaling may predispose the mare
to impaction colic and abnormal swelling.
Mares foaling in paddocks or pasture should either be isolated or have
sufficient space to separate themselves from any other horses in the pasture.
Additionally, the pasture/paddock should be examined for possible hazards to the
foal. A shelter should be provided in case of wet or cold weather.
Regardless of the place, the foaling area should be isolated and quiet. Safety
of the mare and foal should be kept in mind when deciding where the foaling will
occur. The cleanliness of the foaling area cannot be stressed enough. Foaling in
contaminated areas can predispose the foal to bacteria invasion and neonatal
septicemia via the navel stump.
Foals are considered premature if delivered at less than 326 days of gestation
and usually require immediate veterinary attention. Mares foaling before 310
days are considered to have aborted. As always, a qualified veterinary doctor
should be on hand or contacted if your mare begins to foal during this time.
Estimated Foaling Dates
This is the estimated date of parturition/birth. Unless otherwise changed, it is
calculated at 340 days. This is, however, only an estimate -- and by no means
should it be used to determine when your Mare is going to foal. There are many
external indications and tests to provide you with an accurate idea of when to
Mother Natures Mare Foaling Predictor Kit is used to estimate foaling time and is new and improved. This test kit is based on the fact that in most mares, calcium and
magnesium concentrations in prepartum mammary secretion rise progressively
during the latter portion of gestation to the time of foaling.
continue. A majority of mares will show a significant rise in calcium and
magnesium concentration just prior to parturition.
Foals are considered premature if born at less than 326 days of "term"
(gestation) and usually require immediate veterinary attention. Mares foaling
before 310 days are considered to have aborted and normally do not survive. A
qualified veterinary doctor should be on hand or contacted immediately if your
mare begins to foal during this time.
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