how early can piggies get pregnant

[cazzyg1]

my 2 girl piggies are 6 weeks old, i got them at 3 and a bit weeks and they were in with a older male can they be pregnant?

 

[Wiebke]

I would think that you are 99% safe.

Baby girls come into season for the first time generally between 4-6 weeks old; earlier pregnancies are VERY rare.

Here are the vital stats on guinea pigs:
http://www.guinealynx.info/reproduction.html