The swine gestation calculator is designed to help pig farmers and veterinarians accurately predict important dates in a sow’s pregnancy cycle.
If a sow was bred on January 1, using the standard 114-day gestation period:
- The calculator would determine the expected farrowing date as April 24.
- It would also highlight key dates for vaccinations (typically days 60 and 100).
- Schedule movement to farrowing crates (approximately day 109).
Swine Gestation Calculator
| Breeding Date | Expected Farrowing Date | Breed |
|---|---|---|
| January 1 | April 25 | Yorkshire |
| January 15 | May 1 | Landrace |
| February 1 | May 26 | Duroc |
| February 15 | June 10 | Berkshire |
| March 1 | June 25 | Hampshire |
| March 15 | July 9 | Yorkshire |
| March 30 | July 13 | Landrace |
| April 5 | August 28 | Duroc |
| April 20 | August 13 | Berkshire |
| May 1 | September 24 | Hampshire |
| May 15 | September 7 | Yorkshire |
| June 1 | September 24 | Landrace |
| June 15 | October 8 | Duroc |
| July 1 | October 14 | Berkshire |
| July 15 | October 28 | Hampshire |
Pigs Gestation Chart / Calendar
Here is 114 day swine gestation table.
| Event | Days from Breeding | Purpose |
|---|---|---|
| Pregnancy Confirmation | 18-24 days | Verify successful breeding |
| First Vaccination | 60 days | Disease prevention |
| Second Vaccination | 100 days | Boost immunity |
| Move to Farrowing Crate | 109 days | Prepare for birth |
| Expected Farrowing | 114 days | Piglet delivery |
Pig’s Gestation Calculation Formula
The basic formula for calculating pig gestation is:
Expected Farrowing Date = Breeding Date + 114 daysFor more precise calculations, farmers often use:
Expected Farrowing Date = Breeding Date + (3 months, 3 weeks, and 3 days)Breeding Date: March 15
- Add 3 months: June 15
- Add 3 weeks: July 6
- Add 3 days: July 9
Expected Farrowing Date: July 9
How to Calculate the Gestation Period of a Pig?
- Record the Breeding Date: Document the exact date of successful mating
- Add Standard Duration: Include 114 days to the breeding date.
- Factor in Variables: Consider:
- Sow’s age and parity
- Environmental conditions
- Breed-specific variations
For a breeding date of September 1:
- Standard calculation: September 1 + 114 days
- Count forward: September (30 days), October (31 days), November (30 days), December (23 days)
- Expected farrowing date: December 23
What is the Hog Gestation Period?
The hog gestation period is the time between successful conception and farrowing. This duration typically ranges from 113 to 115 days, with the average being 114 days.
- Breed characteristics: Some breeds may have slightly shorter or longer gestations.
- Litter size: Larger litters might lead to slightly earlier farrowing.
- Environmental conditions: Temperature and stress levels can affect timing.
A Yorkshire sow bred on April 15:
- Minimum gestation (113 days): August 5
- Average gestation (114 days): August 6
- Maximum gestation (115 days): August 7
What is the Breeding Calendar for Pigs?
| Breeding Month | Date Bred | Expected Farrowing Date | Breeds |
|---|---|---|---|
| January | 1-31 | April 25 – May 1 | Yorkshire, Landrace |
| February | 1-28 | May 26 – June 1 | Duroc, Hampshire |
| March | 1-31 | June 23 – June 30 | Berkshire, Tamworth |
| April | 1-30 | July 24 – July 31 | Pietrain, Large White |
| May | 1-31 | August 23 – August 31 | Hereford, Kune Kune |
| June | 1-30 | September 23 – September 30 | American Spot, Chester White |
| July | 1-31 | October 23 – October 31 | Welsh, Meishan |
| August | 1-31 | November 23 – November 30 | Mangalitsa, Gloucestershire |
| September | 1-30 | December 24 – December 31 | Iberian, Middle White |
| October | 1-31 | January 23 – January 31 | British Lop, Large Black |
| November | 1-30 | February 23 – February 29 | Saddleback, Berkshire |
| December | 1-31 | March 25 – March 31 | Duroc, Yorkshire |
A breeding calendar is a systematic schedule that helps manage the reproductive cycle of a swine herd. It typically includes:
- Pre-breeding Period (5-7 days):
- Heat detection
- Health assessment
- Nutrition adjustment
- Breeding Window (2-3 days):
- Optimal timing for insemination
- Multiple service opportunities
- Post-breeding Management (First 30 days):
- Stress reduction
- Nutrition monitoring
- Pregnancy confirmation
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