8 months old
She can breed in her first year. She comes into heat every 21 days all year long. She normally will have 2 litters a year and the gestation is 3 months, 3 weeks and 3 days. A sow can live to be 20.
15
A sow can have 2 litters per year. Gestation length of a sow is about 112 to 119 days though most will farrow at about 116 days.
It depends on the breed
Depends on how often the boar is let in the cage, a sow can become pregnant right after birth, however that is not healthy in the least. Also please do not breed your guinea pigs. It is very dangerous for the sow, and is also the main cause of guinea pigs going to adoption shelters.
Assuming that the sow has a litter of 8 gilts at the start of the year, and each gilt is also able to have 6 or 8 gilts, then that's a total of 50 to 60 offspring (or grand-offspring) that can be accredited to Grandmother Sow.
A sow will come into heat every 21 days, but once she is pregnant, the gestation period lasts 115 days. She has to nurse the piglets before becoming pregnant again, so a sow will typically only reproduce twice a year.
A female pig that has never had a litter is a GILT. A Female pig who has had a litter is a SOW. A male that has been castrated is called a BAR and a male pig who can breed is called a Boar ( or sometimes a Hog)
Yes, because if you just want a playmate for the boar (boy) and it's a sow (girl), they will breed and keep on breeding until the sow gets tired. And there will be hundreds of baby guinea pigs which will be too much to handle. So unless you want to breed them (only a few times) then you don't need to, but if not, keep them FAR away. Keep boars in a separate room from sows because if they are in the same room, the boar will smell the sow and try to get to her, and if there are two boars, they will fight until there is serious injury or sadly, death.
A "prolific sow" is a female pig that bears large litters more than once a year. One guideline is 30+ piglets per year. These sows (many bred or fed specifically for pork production) are becoming a larger part of pork production farms.
A healthy sow can have many litters in her lifetime. On an average sows are known to have as many as 23 litters throughout their life.