The first two are the main ones that seem really over-exposed. Composition is great! Did you take them in RAW format? If so, you could really tweak um without losing any quality. The fouth is the best in terms of exposure. The last photo is a little too light and I would darken it up a little bit. As I said before, I love the compostion with my favorite being #2, and # 5.
I would also like to give ya a Congrats too! I can image how awesome it must be having another little one in the house. I am an expecting Dad with a due date of August 5th and I have another daughter as well, so I can relate to you! I'm sure your very proud! You have a Beautiful baby girl spesmeadeus!
Canon EOS Rebel T1i - Canon 55-250mm EFS f/4-5.6 IS lens - Canon 50mm f/1.8 II lens (nifty fifty) - Photomatix Pro 4, Photoshop 5.5