Swine Gestation Calculator

Estimated Farrowing Date:

Earliest Possible Date:

Latest Possible Date:

1. What is Swine Gestation?

Definition: Swine gestation is the period from breeding to farrowing, averaging 114 days but ranging from 112 to 120 days.

Purpose: This calculator predicts your sow’s farrowing date to help you prepare for the piglets’ arrival.

2. How Does the Calculator Work?

The calculator estimates the farrowing date based on the breeding date using this formula:

\[ \text{Farrowing Date} = \text{Breeding Date} + 114 \, \text{days} \]

Explanation: The average gestation period for pigs is about 114 days (approximately 3 months, 3 weeks, and 3 days), though farrowing can occur between 112 and 120 days depending on factors like breed and litter size.

3. Signs of Swine Pregnancy

Indicators: Look for a lack of heat cycles (every 18-24 days) after breeding, slight weight gain, and belly shape changes. Near farrowing, sows may show restlessness and nesting behavior.

4. Preparing for Farrowing

Tips: Provide a clean farrowing area, adjust feed for late pregnancy, and monitor closely. Sows can have 1-20+ piglets, with the fourth litter often being the largest.

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