A lot of people decide to keep a pregnancy to themselves until the main risk of miscarriage has passed, which is at the three-month mark. This can be wise because most prospective parents need a little time to get over a miscarriage, and talking about it to every random well-wisher who happened to hear about the pregnancy doesn’t help.
If you do decide to tell people – and you may feel the need to talk to someone at that time, to help you process it all – it’s probably best to talk to close friends or family and ask them to keep it to themselves.
Even if you don’t tell anyone, people may guess from changes in your behaviour (especially if they know that you’ve been trying). If you are a very convincing liar, or just have very self-absorbed friends, you may be able to keep it under wraps. When you do make the big announcement, it can be a good idea to do it in a pub, to maximise the potential for free drinks.
The trickiest one is telling people about an unplanned pregnancy. You may not have made up your mind what to do yet. Whatever you decide, it’ll be easier to deal with any disapproving reactions than it would have been to deal with having made the wrong choice, so don’t let what other people might think affect your decision.