How can I tell if my guinea pig is pregnant?

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Best information and tips about help for pregnant women, help with pregnancy and pregnancy help
I have a guinea pig named Lola. I think she may be pregnant. My best friend gave her to me. How can I tell if Lola is pregnant?
Her tummy is pretty big

Go to your vet. Make sure you handle her gently, just in case.
her tummy is bigger? If in doubt let the vet have a look.
lola will be writing to "yahoo answers" asking if she is preggo.
Well at this point, it is a waiting game. They generally go about 68 days, toward the end of your piggies pregnancy she will become pear shaped, once she reaches this stage, it is about a month to the delivery date. If she is, make sure you sex the piggies at 3 weeks removing the males, as they will be able to breed at 4 weeks.
You may if you like visit our rescue at this link,
http://www.petfinder.org/shelters/NJ250.html