How long does it take a female dog to give birth after it has been with a dog?

We found our female dog with another dog on the garage a couple of weeks ago, she was having her period, and we suspect that she might be pregnant. Don't ask how the dog got in the garage, im answering ahead, the garage gate is made out of metal, and it has gaps where the skinny dog was able to pass trhough.

You dumped your poor dog unspayed dog in the garage?Bring her to the vet and get her spayed. The world doesn't need more mutts running around. A dog's gestation period is 63 days. Get her fixed now and you won't have to worry about it. A $300 surgery now could save you $10000 in vet bills in 6 weeks.

oo take ur dog to the vet for a check up.and it takes about 6-9 months

depends on the dogtake her to the vets first to find out if she is pregnant and if she is it will be around 8 weeks until the pups are born.

Just go have her spayed. You don't know enough about taking care of the puppies, and I don't have time to even go into the problems you can have if the puppies don't have homes. Oh, and your dog can die in the process of having them, and can cost over $1000 in vet bills if she gets into trouble in delivery. The vet can spay her now, and it will all be over. That is really for the best, and if you don't have the money, ask the humane society about low cost spay programs in your area - almost everyone has one.