Bit late joining this thread, but we told nobody when we started out. We got pg quite quickly once but mc'd. Then pg quite quickly again and had DS, so we never told anyone either of those times until the 'bun was in the oven'
. We only told our parents about the m/c and then told no-one at all until after 12 week scan the second time.
This time it took us 19 months to get pg, and we had started along the fertility clinic appts etc and tests / investigations.
We never told our families - I wasn't entirely sure how supportive they'd actually be. Not in a mean way, but my mum never had any trouble conceiving and I think she'd be full of those 'oh, just relax' type of lines rather than anything actually helpful. And we couldn't tell the in-laws as we lived with them for 4 mths last year - imagine them knowing we were ttc while in their house - I think I would die of shame! 

As the time went on though I did tell some close friends and they were all really good and supportive. They also all listened and said all the right things when we were going for appts etc. As someone else said earlier, I think if you're open about it you find that a lot more people have problems than you'd necessarily think. Eg, with us, people who didn't know might just think we wanted a bigger age gap after DS.
I totally agree that sub fertility is seen as taboo and it shouldn't be. I often want to add on when we tell people we're pg 'and it took us a jolly long time!'
Somehow I feel like we (all of us who go throught it, not just Mr Biscuits and me) should get some extra congratulations for going through the 'troubles' 
Also, I only found MN when we were 18 mths in - I wish I'd found it sooner - as Have says I am so much better inormed now.
Oh and love your FB updates Euro and Have 
