Mare Gestation Calculator
Planning for a new foal? Enter the last breeding date to estimate when your mare will give birth.
Calculation:
1. Start: April 15.
2. Average Duration: 342 Days.
3. End: March 2nd of the following year.
Result: The estimated foaling date is March 2nd, with a typical range between March 10th and April 15th.
How long are horses pregnant?
The average gestation period for horses is approximately 340-345 days (about 11 months). It can range from 320 to 365 days. Mares carrying colts tend to have slightly longer pregnancies than those carrying fillies.
When should I expect my mare to foal?
Most mares foal in late winter or early spring (January through May). The foaling date can be predicted by adding approximately 340 days to the last breeding date. Signs of impending foaling include udder development, relaxation of the vulva, and restlessness.
What should I feed a pregnant mare?
Pregnant mares need increased nutrition, especially in the last trimester. Provide quality hay, appropriate grain, and access to fresh water. Mares in late pregnancy may need 1.5-2% of their body weight in feed. Consult a veterinarian for specific nutritional needs.
What is a "foaling kit" and what should it contain?
A foaling kit contains essential supplies for foaling: clean towels, disinfectants, veterinary gloves, iodine for the umbilical cord, a thermometer, flashlight, and emergency contact numbers for your veterinarian. Have it ready at least 2-3 weeks before the expected due date.
🔗 Related Calculators
📐 Formula
📝 Example Calculation
Calculation:
1. Start: April 15.
2. Average Duration: 342 Days.
3. End: March 2nd of the following year.
Result: The estimated foaling date is March 2nd, with a typical range between March 10th and April 15th.