Hi. When we decided to TTC we didn't tell anyone at all.
Well, one girlfriend knew, because she was TTC at the same time and we were each other's secret supports!

With friends, we were saying we wanted to pay our house off first, and then we would go o/s for a holiday and then we would think about it.
We paid off our house, and decided NOT to go o/s, and started TTC earlier than we planned. People were waiting for our o/s trip before starting to ask us again, so we got a little breathing room there! Took what seemed like forever, and then we didn't want to tell anyone we were pg until we were sure it was safe. We took this to an extreme, and didn't tell our families until about 14-15 weeks. Then I didn't tell work until about 22 weeks (LOL!) It was a really funny secret to keep. No one could tell because our bubba was so little, and they kept asking me when I would get pg because my girlfriend had announced her pregnancy and we were actually about 12 days apart, so it was hilarious when they actually found out.

Anyway, back on the topic, we ended up telling people that we felt like kids ourselves, and didn't feel responsible enough to be parents yet.
That seemed to shut people up. If pressed I used to go down the "what business is it of yours if I procreate or not" track.