There's pre-labor, and labor can be stalled or interrupted and resume later.
However, if she remains in active labor for more than 24 hours with no results, or pushes for an hour with no kitten being born, then it's time to see a vet.
Most cats want someone around for comfort and reassurance. It's also the only way you can know if the cat needs help with anything or needs to get to a vet.
Thats exciting! The pic of your cat earlier today, looks like where my kittens are in my cat. Meaning moved down to the lower legs. Can't wait to see pics of your kittens.
All 4 babies put on weight they now range 4.0 to 4.8 oz. How much weight should they put on daily? All 4 also look alike. They look like identical quads.