Swine Gestation
Calculate pig farrowing (birth) date with comprehensive gestation tracking. Average gestation: 114 days (3 months, 3 weeks, 3 days). Range: 112-120 days. Works for all pig types including domestic,...
Swine Gestation Calculator — Farrowing Date
114 days (3-3-3). Range 112–120. All pig types same.
📥 Inputs
For educational use only. Always confirm dosages and care with a licensed veterinarian.
📋 Key Takeaways
- • 114 days avg (112–120). Memory: 3 months, 3 weeks, 3 days.
- • All pig types same gestation: domestic, mini, potbellied.
- • Before day 109 = abortion. Days 109–112 = premature.
- • 4th litter largest (12–14 piglets). First litter smaller (8–10).
💡 Did You Know?
3-3-3 rule
90 + 21 + 3 = 114 days. Easy memory aid.
Size irrelevant
Mini and potbellied same 114 days as commercial.
Year-round
Pigs breed any season. No specific breeding season.
Heat cycle
18–24 days. >24 days no heat = likely pregnant.
4th litter peak
Parity 3 typically largest. Then gradual decline.
Day 109 threshold
Before = abortion. 109–112 = premature.
📖 How Farrowing Date Works
Farrowing = breeding + 114 days. Litter size by parity. Before day 109 = abortion.
Farrowing = Breeding + 114 days | Range: 112–120 | 3-3-3 = 90+21+3
🎯 Expert Tips
Monitor day 110
Farrowing pens ready. Check multiple times daily.
Nesting behavior
Restless, gathering bedding = near farrowing.
First-time gilts
Smaller litters (8–10). May lamb slightly later.
Breed at 6–8 mo
Wait for adequate body weight before breeding.
⚖️ Gestation Stages
| Stage | Days | Key Events |
|---|---|---|
| Breeding | 0 | Conception |
| Implantation | 10 | Embryos implant |
| Pregnancy confirm | 21 | Ultrasound possible |
| Abortion threshold | 109 | Before = abortion |
| Earliest farrowing | 112 | Start of normal range |
| Expected farrowing | 114 | 3-3-3 average |
| Latest farrowing | 120 | End of normal range |
❓ FAQ
Do mini/potbellied pigs have different gestation?
No. All pigs: 114 days. Size doesn't affect gestation.
Abortion vs premature?
Before day 109 = abortion. Days 109–112 = premature. 112–120 = normal.
When can pigs first breed?
3–12 months. Recommend 6–8 months, adequate weight.
Heat cycle?
18–24 days. Male+female >24 days no heat = likely pregnant.
Largest litter?
4th litter (parity 3). 12–14+ piglets. First: 8–10.
Breed year-round?
Yes. No specific season.
📊 Stats
📚 Sources
- • USDA, extension services
- • National Pork Board
- • Livestock veterinary references
⚠️ Disclaimer
Estimates only. Not veterinary advice. Consult vet for breeding management.
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