If you are targeting new parents maybe a title something like "How to Make Your Baby Happy, Healthy and Smart" would attract more readers.
Also it is pretty long. Maybe you could divide it into two or three hubs (each focusing on different areas of development) and link them together.
I know this is a selling hub,(and that's fine) but it might not seem so much like a sales pitch if you took the particular parts and focused on particular aspects of development, adding a little more information and adding in the products as if they are an "Oh, by the way, this might help."
Don't know if this will make any difference, but maybe something to think about.