Here is what I think...
I am going to comment on your pictures minus the artwork. The artwork that you did is personal preference.
First of call, when you want to portray the 1st month baby, what does it signify that? What I see is just a picture of a baby. It could be anytime from 3-6 weeks not really given you the 1st month feel.
Secondly, the white balance on the skin tone is inconsistent.
Third, the baby doesn't look "comfortable" at all in some of the pictures especially on that the baby is on her tummy.
Overall, I think the artwork is dominating and it is probably ok if you are selling it as a card but it is just too much which take the attention away from the actual subject.
Regards,
Hart