www.thecatsite.com/forums is a very good website for informaiton about cats. There are really nice people who know what they are talking about and would be glad to help anyone.
I wouldn't let you cat get pregnant there are so many unwanted kittens in this world already, you really dont need to add more. Not trying to be mean or anything :).
Cats are usually pregnant for 60-63 days. Not a month. And very young cats will and can get pregnant. But they would probabley have alot of problems. Your cat can also have many fathers, and can be carring two litters at once. Like if your cat gets bred a week apart, one litter will be b orn earlier and she will still be pregnant with the others. Unless she has then too, and then you will have premature kittens. So unless you are seriousely sure you are going to be able to handle all the things that can go wrong, don't let her get pregnant. If something goes wrong it can cost you alot of money. Around here where I live a c-section costs around 600 bucks. So just make your decisions wisely, :)
One unspayed dog and her offspring can lead to 67,000 dogs in six years. One unspayed cat and her offspring can produce 420,000 cats in seven years. Approximately 70,000 puppies and kittens are born in the United States each day. Some of them are born to breeders who sell animals for a profit, some are born to people who want their cat or dog to have the “experience” of having a litter or who want their children to witness the “miracle of life,” and some result from allowing fertile animals to roam freely and mate.