If you bring a kitten home, then you should get it spayed or neutered as soon as you can. Spaying and neutering is a simple surgical procedure the veterinarian does that prevents the cats from reproducing in the future. A female cat will be spayed, while a male cat will be neutered. Here is more information on the advantages of having your cat fixed:
You won't be adding to the overpopulation of cats
There are more cats out there than there are homes for. This is why there are so many strays and feral cats. When you allow your cat to reproduce, then some of those kittens will grow up to reproduce. They may even have a lot of litters throughout their lifetime. Then, those litters will reproduce, and it will continue. Even when you find good homes for the kittens your cat has, you don't know that the kittens won't grow up, run away, and reproduce, or that they won't end up being outdoor cats that continue to have litters. The best way to make sure you aren't contributing to the overpopulation of cats is to have your own kitten fixed.
Your cat won't want to roam so badly
If you want to keep your cat indoors, then you will find it much easier to keep them inside the house when you have them fixed. When your cat isn't fixed, then they will have a very strong desire to get outside and find a mate. A female cat will try hard to get out when she is in heat. A male cat will try hard to get outside when there is a female nearby that's in heat. If your cat is an outside cat, then they will wander much more and much further from home when they aren't fixed. The more they wander, the greater the chances they will get lost or something else will happen to them.
Your cat will be more manageable
When you have a cat that isn't fixed, it can become a problem cat during mating season. Even the best-behaved cats can start to behave badly. You may find your cat trying to rip through the screens, clawing up the carpet, and being exceptionally loud. They can become so vocal that you have a hard time getting to sleep at night. When you bring them to the vet and have them spayed or neutered through a simple and very common surgical procedure, you won't have to worry about these things.
Contact a local vet to learn more about fixing your kitten and other veterinary surgical services.