I'm usually the oddball in this conversation. I think that we live in a world that is more and more aware of the struggles families have with getting and staying pregnant. And that by making those closest to us aware that we are trying and that we want children as soon as possible, they're actually more sensitive and supportive. The hubs actually proclaimed at our wedding that we couldn't start making babies soon enough, and it actually was a wonderful thing. Our friends that would have gotten rid of their baby things are saving them in case we could use them. Those friends that struggled have stopped to tell us that it'll happen. Our parents actually give us zero pressure now; they know we're doing everything we can to get pregnant, and if we haven't made an announcement, there's no reason to bug us. They bugged us more before because they wanted a sense of *if* they'd get more grand kids. Having the reassurance that we're hoping to make that happen, they're content to sit back and await the surprise of our announcement.
My girlfriends that are also trying, have formed up a little support group. It helps. To have friends to cheer you up after a rough month. Wine and chocolate when AF shows up. Being able to discuss charts and plans and cheer each other on.
So I guess it all depends on how you feel about it all, and how the people around you tend to react. We're pretty small and tight groups, and it feels good to support each other since we're all in similar places in our life.
All that said, there are some people I don't and wouldn't tell. Co-workers. I have one that already tries to tell me when I can or can't get pregnant, and I'd rather keep up the impression I have no interest in kids, just so they'll lay off. And despite knowing it's 2015, sometimes I still feel like it could be a bit of a career hamper.
So pick and choose, but go with what's right for you. When we actually get our BFP, I think I'll let my besties know, and no one else until the 12 week mark. I think the hubs would probably tell his bests too, just for the support in case something goes wrong. As much as we support each other, guys understand guys and woman get woman better sometimes during these things.