I'm waiting until after Christmas when I'll be close to 16 weeks, so that when we announce it to our families at Christmas, our Mom's will have some time to spread the good news on their own and they won't hear - "Yeah we know. Heard about it on fb." lol
I have told a couple of people and they keep dropping annoying hints on fb, so many that I deleted their comments and told them to shush! No one is stealing my thunder if I can help it. ;p