* Ultrasound and X-rays are not commonly used on guinea pigs: These methods are invasive and may be risky for the pregnant guinea pig.
* The gestation period is fairly short: It lasts around 63 days, so there isn't a lot of time to observe changes in the guinea pig's belly to guess the litter size.
* The number of babies varies: Guinea pigs can have anywhere from 1 to 10 babies in a litter, with an average of 4-6.
What you can do:
* Observe her belly size: As her due date approaches, you'll notice her belly getting larger. But this isn't an accurate indicator of the number of babies.
* Pay attention to her behavior: A pregnant guinea pig may become more affectionate, eat more, and have a slightly increased appetite. She might also nest more, gathering bedding and hay in a favorite spot.
It's best to be patient and wait for the babies to arrive! It's exciting to anticipate the arrival of new guinea pig pups, but it's impossible to know the litter size beforehand.