I know that I'll tell my Mom and sisters early on (after the first doctor visit maybe), but I'll wait to spread the news to everyone else until 3 months. At least that's the plan, but I also have trouble keeping my mouth shut. And honestly if something did go wrong, I would need the support of family and friends. My guess is DH would want to tell his Mom and siblings too, so it probably wouldn't keep secret long. I would definitely keep it quiet at work though.