I think there is no "right time", its whenever you feel comfortable doing so. Some women can't wait to shout it from the rooftops as soon as they get a positive pregnancy test, others prefer to wait it out as to not get others hopes up if something should go wrong. In my opinion there are only three people who need to know: You, the father (whether you are with him or not) and your doctor. The rest are all up to you. The one thing id like to say, is that this is your decision, your life, your choices. If other people get offended because you chose to wait before you told them, oh well. It isn't about them. Its about what feels right for you and your baby.