Since you requested critiques I will give it a go.
Let me first say they are great captures. I think you caught that "awww" moment that comes with shooting newborns, very well.
#1 Looks like the focus point fell on her belly. therefore leaving the face and eyes unfocused. It looks like you tried to save it, but the focus is still on the belly.
#2 has AMAZING color ...very pretty. Focus looks great on the eyes, but it looks like you softened it too much in PP or skin smoothed it too much? I am not sure of your workflow? It makes the baby look like plastic a little too much. Just tone down that on this one and you have got an AWESOME picture ready for print
#3 Beautiful Lighting, looks spot on to me. I also like the criss crossed arms of the dad. However you chopped off part of the dad's hand and the baby's feet? Baby feet are totally adorable and should be kept in the picture. Other then that, this photo is fabulous.
#4 my FAVORITE of the bunch. but again the foot is lost in this photo. I would also like to see the baby's face down more so we arent looking directly at her chin? But that is a personal preference.
Take these notes for what they are worth, as I am still a newbie as well. But the things listed above are what caught my eye.
Overall I think you did an Awesome job. I am sure more will post their replies as the day progresses.