I have a female and male kitten born in the same litter?

Yes, they will mate. They should both be fixed within two months.

about 6 months. Ask your vet to tell you what the first signs are when the girl will go into heat. I had a girl and boy from the same litter, and they said not to worry about mating until they were 6 months old.

Male cats are able to mate and reproduce as young as 4 months of age. Females typically have their first heat cycle around 5-6 months of age. However, a female cat does NOT have to be in heat to get pregnant, so do not wait for her to go into heat. Please get them spayed/neutered at soon as possible, preferable at or before 4 months of age.

It doesn't take very long, they will still be adoreable kittens and then all of the sudden be mating. I think about 6 months is average time.

Kittens as young as 4-5 months old can and do breed, so get them spayed and neutered by 3-4 months old. If you cannot do this, they have to be kept separated so they do not breed until you get them done.

i woudnt let them mate if they are from the same litter. that makes em brother an sister...

should just get them spayed/neutered....

the spraying is bad enough from either one, not to mention the excess of more kitties runing around.

can get them fixed rather young, and if you take them to animal welfare to get it done, they can give lower cost and maybe price breakt on doing both at the same time.

Do your cats tell you and your partner when to mate/have sex?

If you fix them it won't be a problem. Toms gotta be fixed or they will run away.