Honestly, I think this is YOUR choice. Yes he can express his opinion, but at the end of the day, if something 'did' happen, would you rather people knowing or not. It can be hard to tell people you have miscarried if they don't even know your are pregnant. But different people deal with these things differently, and I think you need to ask how you would deal with it, and then explain your decision to your DH, but at the end of the day, its still your decision.