🐹 Guinea Pig Pregnancy Calculator
Track the breeding date to plan nutrition, space, and healthcare for pregnant sows and their pups.
Guinea pigs can conceive quickly—use the first day they were housed with a boar.
Gestation Overview
Sows deliver between 59 and 72 days. Shorter gestations often produce larger litters.
How to Use This Calculator
Log the breeding date
Enter the date the sow was paired with the boar. Guinea pigs breed rapidly, so keep detailed records.
Review the timeline
View the average due date plus early and late delivery estimates to anticipate labor.
Support the sow
Adjust diet for higher vitamin C and calcium, minimize stress, and prepare a quiet birthing enclosure.
Formula
Due Date ≈ Breeding Date + 66 days
Use the ±7 day range to accommodate litter size differences. First pregnancies or smaller litters may take longer.
Full Description
Guinea pigs carry precocial pups that are born fully furred with open eyes. Adequate prenatal nutrition and low-stress housing are essential to prevent complications such as pregnancy toxemia.
This calculator highlights key checkpoints so caretakers can monitor weight, supplement vitamin C, and prepare for the brief but intense birthing process.
Frequently Asked Questions
Can guinea pigs breed again immediately?
Sows enter estrus shortly after giving birth. Separate males promptly to avoid continuous pregnancies, which are high risk.
When should I consult a vet?
Seek veterinary care if gestation exceeds 72 days, if the sow stops eating, or if no pup is delivered within 20 minutes of strong contractions.
How many pups are typical?
Litters average 2–4 pups. Larger litters may result in earlier delivery; singletons may extend toward the late window.
Do guinea pigs need nesting materials?
Provide soft bedding and hiding shelters. Avoid loose stringy materials that could entangle pups.