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Calculators
Biology Calculators
Animal Pregnancy Calculators
Mare Gestation Calculator

Mare Gestation Calculator | Foaling Date

Estimate horse foaling date.

Pregnancy Details for Mare (Horse)

Species Mode

Mare (Horse) Selection

Estimated Due Date
February 15, 2027
Mated: Mar 12
Mare (Horse) Gestation
339
Days to Go
Pregnancy Progress
0%
First Trimester
Mar 12
Second Trimester
Jul 4
Third Trimester
Oct 26

Clinical Milestone Feed

Initial Pregnancy Scan

Mar 26 - Mar 28, 2026

Essential to detect twins and confirm pregnancy.

Heartbeat Scan

Apr 6 - Apr 9, 2026

Verification of fetal viability.

EHV-1 Vaccination

Aug 9, 2026

Preventative vaccination for equine herpesvirus.

Udder Development

Jan 16 - Feb 5, 2027

Bagging up begins to occur.

Milk Calcium Testing

Feb 10, 2027

Monitor milk chemistry to predict foaling.

Species Quick Facts
Avg. Litter Size
1 foal
Birth Weight
100-150 lbs
Total Duration
340 Days
Clinical Range
MinJan 26
MaxMar 17
"Veterinary Advice"

Always consult with a qualified veterinarian specializing in mare (horse) health. This timeline is an educational estimate and biological variance is common.

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About Mare Gestation Calculator

The Mare Gestation Calculator is an indispensable tool for mare owners, breeders, and equine professionals seeking to precisely estimate a mare's foaling date. By simply inputting the last breeding date, our calculator applies standard equine gestation periods (typically ranging from 330 to 345 days) to swiftly provide a predicted due date for your mare. This valuable resource empowers you to meticulously plan for the arrival of your foal, from preparing the foaling stall to scheduling veterinary checks. Gain confidence and peace of mind in your breeding program through accurate timeline anticipation and proactive management.

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