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Guinea Pig Gestation Calculator
Guinea pig pregnancy uses 68 days in this calculator and a 59 to 72 day planning window. Enter the mating date below.
Guinea Pig gestation at a glance
| Average used by this calculator | 68 days (about 9.7 weeks) |
|---|---|
| Window shown by this calculator | 59 to 72 days after breeding |
| Due date formula | Breeding date + 68 days |
| Young | Pups |
| Litter size | Usually about 3 in Merck owner guidance |
Merck explains that pelvic cartilage stiffens with age in guinea pigs, raising the risk of difficult labor, which can be serious. Use the due date to plan veterinary access before birth.
Guinea pig pregnancy and birth timeline
| Mating date | The calculator starts with the entered mating date. |
|---|---|
| Gestation length | Merck reports a broad 59 to 72 day range for guinea pigs. |
| Birth | Merck reports litters of 1 to 7 pups, usually about 3. |
| About 3 weeks after birth | Merck lists this as the weaning age. |
Frequently asked questions
How long is a guinea pig pregnant?
The guinea pig calculator uses 68 days and a 59 to 72 day planning window after mating, matching the broad range in Merck owner guidance.
How do I calculate a guinea pig due date?
Enter the mating date and the guinea pig calculator adds 68 days for an estimated pup due date and shows its planning window.
How many pups does a guinea pig have?
Merck says a guinea pig litter may have 1 to 7 pups and is usually about 3.
When should I call a veterinarian during guinea pig birth?
Seek veterinary help promptly if birth appears difficult; Merck describes guinea pig dystocia as serious.
Sources
- Merck Veterinary Manual: Common Health Problems of Guinea Pigs
- Merck Veterinary Manual: Description and Physical Characteristics of Guinea Pigs
Reviewed by Elliott Garber, DVM · Last reviewed
