I have always wanted to have the perfect cards for birth. Green & Yellow for birth are my favorite colours. If you wish to have a girly of boyish card therefore you could planned for the pink & blue colour :))
Personnally I prefer to have something "jovial" for this event :
This one was for a little miracle " Pink" with pink little buttons
I really love this one was made for a baby girl . I get inspirations from a youtube clip.
Hope that you have enjoyed :)