We have a good collection of articles in the Cat Health section which you can access by scrolling up to the brown bar, clicking on Articles,and then choosing the Cat Health section and scrolling through the choices. To make this super easy for you, I am copying the links regarding birth, delivery and newborns for you here. After reading this information, let us know if you have any more questions. And good luck with your approaching new arrivals.
She looks pregnant to me based on her teats. A birds eye view picture of her stand would make it a little easier to guess how far along she is. Can you feel the kittens moving? Is she lactating?
Could you take a side/birds eye view pic? Also her nipples are very pink so i would say yes, she is pregnant. Can you feel her ribs? does her belly sag or seem bigger? you might to be able to see a few lumps in her stomach.I would say she is about 1 month into pregnancy