Guinea Pig Pregnancy Female guinea pigs become fertile beginning as early as four weeks although pregnancy is not recommended until body weight has reached one pound. If the female is too small she may have trouble delivering the babies and special steps will need to be taken. Consult your veterinarian on the methods you can use to safely help a young sow if you find a pregnant one on your hands.

The average guinea pig pregnancy can last from 64 to 72 days. A female can give birth to one to six babies with three to four being average. Some sources indicate that the longer the gestation period the smaller the litter. By the time birth is eminent, the weight of the babies will account for 30% of the female’s total body weight.

In order to support this growth expect your guinea pig to require more food and water as she could be supporting up to six babies. Be sure that the food being fed is particularly high in vitamin C as requirements double to 20 mgs per day during pregnancy. If food pellets are being used this is a good time to double check the quality of the product – look for 100% of the daily requirement of vitamin C as well as 20% crude protein and 16% fiber. Supplement her as usual with fresh fruits and vegetables focusing on foods high in vitamin C. Recommended foods include parsley, cabbage, and dandelion.

During this time be sure and remember to continue to let the pregnant female out for exercise and play. Be careful to avoid unnecessary stomach squeezing as well as stress on the female.

Advice about when to move the pregnant guinea pig into a separate cage is mixed. What is known for sure is that by the time the female gives birth, she’ll need to be moved into a separate cage. Male guinea pigs will be a threat to the puppies and the female will be fertile again immediately. No female should have back to back litters as it is cruel and detrimental their health. Some sources indicate that if neutered the father of the puppies can remain in the cage with the mother. If the father is in the cage during birth he may assist with delivery by cleaning and warming the babies. Cooperation is not guaranteed and if the female appears distressed by the presence of the male – remove him from the cage. How early the female is moved is dependent on how much room there is in the existing cage and whether or not the pregnant female appears to be enjoying the company of others. If worried, move the female. In general though, a week before birth should be the minimum.

Amanda is a lifelong guinea pig lover. For more great information, on pregnant guinea pigs visit the Guinea Pig Resource Center!