Many many things about baby announcements
The other step in baby shower planning, once the invitations are bought, is to figure out who will be attending. There is no limit to who may attend, especially nowadays. One consideration is to send out invitations to people who know the mother well enough to buy something appropriate for the new baby. It may also be considered rude to send out invitations to people who do not know the mother. However, close friends and family members are not the only people who can receive invitations.