Ok, I never plan on having another one... And this idea is for asking someone to be a bridesmaid, but this would be a great way of announcing you're pregnant. Little message could say how you're going to pop... Or something along those lines.
Fledermaus Einladung zu #Halloween // halloweeninvi
DIY Polka Dot Envelope Liner - Such a simple idea to add that special touch.
Wedding Bells: Invitation Etiquette
Invitation Etiquette: How To Word Your Wedding Invitations