Foal Calculator and Mare Care Scheduler

Foal Calculator

To calculate an approximate "due date"

Enter last breeding date in format shown:

Next, enter duration of gestation in days:
(My mare took 340 days)

Mare's estimated foaling date:

To calculate number of days "mare in foal"

Enter last date mare was bred in format shown:

Next, enter today's date in format shown:

Estimate of days mare has been in foal:

Here is a look at what most of us go through when-its-time!

To calculate for Mare Care regimen
Just enter last breeding date: / /
This will give you the dates to schedule ultrasound/palpations, worming, and vaccinations !
Currently, the earliest that an Ultrasound/Palpation can detect a pregnancy is at 14 days/2 weeks: (but checking at 17 days is better in case you have to re-breed)	/ /
The second Ultrasound/Palpation is now scheduled for detection of the heartbeat at 28 days/4 weeks: (but the beats can be detected anytime after day 24)	/ /
Give a TT/Flu/SS innoculation and coordinate the timing of 8 week purge worming schedule (if out of alignment) now at 3 months/84 days/12 weeks:	/ /
1st Rhinopneumonitis and purge worm at 5 months/140 days/20 weeks:	/ /
2nd Rhinopneumonitis and purge worm at 7 months/196 days/28 weeks:	/ /
3rd Rhinopneumonitis and purge worm at 9 months/252 days/36 weeks:	/ /
Give TT/Flu/SS innoculation to booster antibodies in the mare's colostrum. Do last purge worm and now start giving a daily wormer; (this will decrease scalding of the newborn foal) at 10 months/308 days/44 weeks :	/ /
Start watching for the bag to be waxing up; based on 336 days/48 weeks: (should deliver in 4 or 5 days)	/ /

This is a printable page about the gestation period.

Questions? E-mail : Equine Veterinary Service