When we initially found out we were not going to have a child without 'help' we kept it to ourselves. It was pretty tough at first - we were scared to death about the money, the time, and if we would ever have a baby and all the stress & anxiety that goes along with not knowing something so BIG in your life.
At first my wife didn't want to tell anyone - it took some convincing to get an agreement to tell her parents. Once we did, I think a small weight was lifted off our shoulders - sort of like a cheerleading section. It still felt like there was a ton of weight up there but it was noticeably better.
Then at good times we ended up telling our siblings, close friends, etc. Neither of us are good at keeping secrets so it was bound to happen. I don't tell anyone else but when my wife feels like it she does - it doesn't bother me. I would rather have people thinking about us and being in our corner then constantly having to come up with different answers to "So, when are you going to start a family?" It gets really old - fast.
So, I'm curious what other's philosophies are on this - what they did, what they plan to do, etc.
My vote is to do what makes you feel better - and I would leave it ultimately up to the one who is actually Fertility Challenged. (we like that term better)
Update on us: Just keeping the fingers crossed. My wife has a blood test for progesterone levels on Wed. and then she can take a HPT a week later.