Strikkie, this is so much fun to organise a stork party and im sure heartbreaking at the same time...
When it comes to invites, it's always a nice idea, to incorporate a scan pic of baba, if you can get your hands on one of the scans that is...
You could say in the invite something along the lines of:
We are tickled pink and can't wait to say ...
our sweet baby girl is on the way!
Bottles and booties, diapers and pins,
this is where the love begins!
Diapers and bibs, bottles and more
This is what baby showers are for!
Heard the forecast?
A baby is predicted,
but first there will be a shower!
Please come!
Baby Angel.
Welcome to this Earth.
The whole wide world
awaits your birth!
We're all excited and happy as can be! (Mom's name) and (Dad's name) will soon be a family of three!
Tea parties, baby dolls and dress up clothes
This time it's a girl with ribbons and bows!
Tiny fingers, tiny toes,
little itty-bitty clothes,
Dresses, dolls, hair and curls,
guess what ... it's a girl!
Hope some of those help

Shout if you need more