Swine Gestation Tracker
Follow your sow's journey to farrowing
Enter the breeding date to track the porcine gestation process. The AI will provide tailored farrowing advice for each stage.
✅ What This Calculates + Why It Matters
The Swine Gestation Tracker (Porcine Pregnancy Calculator) is a vital tool for pig farmers, breeders, and veterinarians to predict the Farrowing Date of a pregnant sow. By entering the breeding date, this tool applies the standard pig gestation period of 114 days (famous as 3 months, 3 weeks, and 3 days) to provide an estimated due date and a detailed biological timeline. Proper farrowing management is critical for the survival of the piglets and the health of the sow.
Why is tracking a pig's pregnancy so vital? Pigs have large litters, and the final weeks of pregnancy are critical for fetal development and the sow's metabolic health. Knowing the due date allows you to move the sow to a clean, comfortable farrowing house at the correct time, which is essential for preventing the spread of disease and ensuring that the piglets have a warm, safe environment. Being prepared allows you to monitor the birth and intervene if the sow has difficulty delivering her large litter.
This tracker provides a "Milestone Roadmap" for the 114-day journey. It highlights when pregnancy confirmation is most effective, when abdominal growth becomes obvious, and the critical farrowing house transition. By using this tool, you can ensure your sow receives the best possible care during her journey to motherhood.
Porcine Gestation: The 3-3-3 Rule
The standard gestation period for pigs is 114 days, which is easy to remember as 3 months, 3 weeks, and 3 days. While this is remarkably consistent, individual pregnancies can vary by a few days. This calculator provides the gold-standard biological baseline used across the global swine-raising community for management and planning.
✅ The Formula Explained Simply
Calculating a pig's due date follows a standard chronological formula, adding the gestation period to the date of breeding:
Farrowing Date = Breeding Date + 114 Days
Key Management Milestones:
- Heat Check: Breeding Date + 21 Days (If she doesn't return to heat, she is likely pregnant).
- Growth Watch: Breeding Date + 60 Days (Noticeable abdominal expansion).
- Farrowing Transition: Farrowing Date - 4 Days (Move to farrowing house).
- Farrowing Watch: Farrowing Date - 1 Day (Monitor for birth).
✅ 3-5 Real-World Examples
Example 1: A Standard Breeding
Breeding Date: May 1st
Gestation: 114 days
Estimated Farrowing Date: August 23rd.
Note: Move her to the farrowing house by August 19th.
Example 2: Early Detection Window
Breeding Date: June 15th.
Status: By July 6th (Day 21), if the sow shows no signs of returning to heat, you can be fairly confident she is pregnant.
Example 3: Final Preparations
Breeding Date: March 10th. Due date is July 2nd.
Status: It is late June. The sow's udder is filling with milk, and she may be starting to carry straw around her pen.
✅ FAQ Section (Google PAA Targeted)
How can I tell if my pig is pregnant?
The earliest indicator is a failure to return to heat 21 days after breeding. Later signs include abdominal swelling and enlarged teats. Veterinary ultrasound can confirm pregnancy as early as day 25-30.
What should I feed a pregnant sow?
In the first two-thirds of pregnancy, a maintenance diet is sufficient to avoid over-fattening the sow. In the final month, increase her energy intake to support the rapid growth of the piglets. Ensure she has access to clean water and a balanced mineral supplement.
How many piglets will my pig have?
Litter size varies by breed and age of the sow. A typical litter is 10-12 piglets, but some specialized breeds can have 15 or more. A healthy sow can raise a large litter if she is well-fed and has a clean, warm environment.
Why do pigs build nests before farrowing?
Building a nest is a natural instinct for sows. They will carry straw or other materials to a quiet spot to create a soft, safe area for their piglets. This behavior is a very clear sign that farrowing is within 24 hours.
✅ Related Calculators
✅ AI Explanation of Results
Our AI Farrowing Guide analyzes your sow's pregnancy with a focus on "Porcine Reproductive Efficiency." It divides the 114-day period into specific management phases, providing nutritional and environmental alerts for each stage. The AI highlights "Alert Windows" for heat checks, abdominal monitoring, and farrowing house transition. This turns a simple date calculator into a professional guide for your sow's successful journey to motherhood.
The 3-3-3 Rule for Pigs
A sow is pregnant for 3 months, 3 weeks, and 3 days (114 days total). This remarkably consistent cycle makes swine management highly predictable.
Farrowing Care
Moving the sow to a farrowing crate 5-7 days before the due date helps reduce piglet mortality.