guinea pigs, pregnancy

Question
I bought two guinea pigs, and there a boy and a girl, a few months ago not sprayed or nuetered, and I think the girl is pregnant because her stomach has gotton large and hard since two weeks ago, what do I do to make sure, how big of a cage do I need and do I have to take the male out?  

Answer
Yes you do want to take the male out from the female because she will come back into season again almost immediately after she delivers and should she get pregnant again so soon it could cause problems.  So make sure to seperate them.  There is no way to really tell you to tell if she is pregnant other than her tummy will be bigger and tighter and her tits will be more pronounced.  Hope this helps.