household pet cat

Question
What is the normal length of time for a cat's labor & delivery?

Answer
It will depend on the individual cat and number of kittens, but usually kittens should be passed every 15-45 minutes.  If it is longer than 45 minutes in between kittens and the cat is straining, call your vet.  Cats can willfully stop their labor up to 24-36 hrs if they are disturbed, so make sure the cat has a quiet place to queen that is warm with a lot of bedding.