Calculadora de Gestação Suína
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
gestação suína: 114 dias (3m 3s 3d)
About this calculator
The Swine Gestation Calculator is a practical tool for farmers, veterinarians, and animal science students to estimate the farrowing date of sows. The gestation period for swine is approximately 114 days, known as the '3 months, 3 weeks, and 3 days' rule. The calculator uses this reference to determine the probable farrowing date based on the breeding or insemination date.
It works simply: the user enters the breeding date, and the calculator adds 114 days, displaying the estimated farrowing date. This calculation is based on the average swine gestation, which may vary slightly among breeds and individual conditions. The tool is useful for planning management, feeding, and preparation of the farrowing environment.
When to use? Ideal for scheduling sow monitoring, avoiding surprises, and ensuring assistance during farrowing. It is especially useful in commercial farms where reproductive planning is essential for productivity. Cautions: gestation can range from 111 to 117 days; therefore, the calculated date is an estimate. Observe signs of imminent farrowing, such as restlessness and contractions, for intervention if needed.
The calculator is a support tool, not a substitute for veterinary monitoring. Factors like stress, nutrition, and sow health can affect the exact duration. Use it as a reference to organize the farrowing calendar and improve herd management.
Frequently asked questions
Why is swine gestation 114 days?
114 days is the average gestational period for sows, popularly remembered as '3 months, 3 weeks, and 3 days'. This duration was established by empirical observation and is widely accepted in pig farming.
Does the calculator work for all pig breeds?
Yes, the calculator uses the average of 114 days, which is valid for most breeds. However, individual variations may occur, so the date is an estimate.
What if the sow does not farrow on the calculated date?
Gestation can range from 111 to 117 days. If it exceeds 117 days, consult a veterinarian. Observe signs of imminent farrowing and prepare the environment.
Can I use the calculator for first-time sows?
Yes, the calculator works for any sow regardless of parity. Gestation length is similar, but first-time sows may have longer farrowing.
Does the calculator consider artificial insemination date?
Yes, you should enter the breeding or artificial insemination date. The calculator adds 114 days from that date.