1. What is the Foal Due Date Calculation?

The foal due date is calculated by adding 340 days to the breeding date. This is the average gestation period for horses, though actual gestation can range from 320 to 370 days.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( DD \) — Foal due date
• \( BD \) — Breeding date

Explanation: The calculation adds 340 days (average horse gestation period) to the breeding date to estimate the foaling date.

3. Importance of Due Date Calculation

Details: Knowing the estimated due date helps in preparing for foaling, scheduling veterinary checks, and ensuring proper care during the final stages of pregnancy.

4. Using the Calculator

Tips: Enter the exact breeding date in the format YYYY-MM-DD. The calculator will display the estimated due date 340 days later.

5. Frequently Asked Questions (FAQ)

Q1: Is 340 days always accurate?
A: No, this is an average. Actual gestation can range from 320 to 370 days depending on breed, season, and other factors.

Q2: When should I start monitoring for foaling signs?
A: Begin close monitoring about 2 weeks before the calculated due date and continue until foaling occurs.

Q3: Does mare age affect gestation length?
A: Yes, older mares often have slightly longer gestation periods than younger mares.

Q4: What affects gestation length?
A: Season (longer in winter), foal gender (colts often longer), and mare nutrition can all affect gestation length.

Q5: When should I call the vet?
A: If the mare goes significantly beyond the due date (350+ days) or shows signs of distress during pregnancy.