Yeah, reckon I agree with Flea, tell people when you're ready for everyone to know!

DH & I are different, we're quite close to our parents (we're both still quite young, and mine are 2 suburbs away, his, 1.5hrs away) So we showed them our ultrasound!

Did you want to speak with them in person, and hear their reaction? Otherwise you could send a card, that could be nice.

Good luck, whenever and however you want to tell them!