Nice set up on the first one and the lighting is good too. I think it could be a bit warmer though. Newborns often have weird skin tones so I try not to do anything to make them look any more pale than they already do.
The second one seems under exposed. You probably want to keep the blacks nice and dark...but I think the skin could be a lot brighter. Nice shot of baby on mom though.
I like the concept of the last one...but I think that if you are going to have the feet in focus and leave the rest to get blurry...then the feet should be more prominent in the image.
Overall, quite good for a first newborn shoot.