1. What is Foal Due Date Calculation?

The foal due date calculation estimates when a mare will give birth based on the breeding date. The average gestation period for horses is approximately 340 days, though it can vary from 320 to 370 days.

2. How Does the Calculator Work?

The calculator uses a simple formula:

Where:

• Breeding Date — The date when the mare was bred
• 340 days — Average equine gestation period

Explanation: This provides an estimated foaling date, though individual mares may deliver earlier or later.

3. Importance of Due Date Calculation

Details: Knowing the estimated foaling date helps prepare for proper mare care, foaling facilities, and veterinary assistance when needed.

4. Using the Calculator

Tips: Enter the exact breeding date to get the most accurate estimation. Remember this is an average - monitor the mare closely as the date approaches.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the 340-day calculation?
A: While 340 days is the average, normal gestation can range from 320-370 days. First-time mares often carry longer.

Q2: What factors affect gestation length?
A: Season (shorter in spring), mare's age, foal's sex (colts carried longer), and nutrition can all influence gestation length.

Q3: When should I start monitoring the mare closely?
A: Begin close observation at 320 days. Most mares foal between 330-345 days.

Q4: Are there signs of approaching foaling?
A: Yes - udder development, waxing of teats, relaxation of pelvic muscles, and behavioral changes indicate foaling is near.

Q5: Should I adjust for multiple breedings?
A: Use the last breeding date. Mares typically ovulate 24-48 hours before the end of estrus.