#1- I like the idea of this but you should clone out the black over the baby's shoulder and maybe shoose a better angle.
2-I also like except the baby looks like it is falling. (although that could just be me!)
#3-I alright but a little unimaginitive. It looks like something parents could have taken themselves.
#4-I'm gonna be honest and say that the baby looks dead, there is something very very weird about this pp Although, I like the setup of the shot, including the picture of the parents is cool
#5-Same advice as in #1
All that being said, babies are the hardest things to shoot (IMO) and the best thing you can do is to keep trying. I never shoot babies this age, they are useless. (I don't mean that in a bad way but they are too old to sleep through the session and to young to sit up by themselves and play) Don't give up and just keep trying.