Ive felt the kittens moving how long will it be before they born?

Unborn kittens can start moving within a few weeks after conception, but you may not be able to see or feel the movement until they are older, at around 5 to 6 weeks gestation. Since kittens are born after 9 weeks, this means that from the time you detect movement until they are born is about 3 to 4 weeks.