My 1st pregnancy was in late 30s, so I was well aware of the higher risks. We decided to tell no one till the NIPT results came back, and so glad we didn't. Unfortunately, the pregnancy had life limiting genetic disorder and we chose TFMR.
Next pregnancy I MC at 7 weeks.
The reason we didn't notify/tell everyone, was varied. OH's parents were living abroad, so didnt see them anyway. His mother cannot keep anything to herself, and their entire family/street/shops would have been told- even if I'd said we were keeping it just to close family.
I'm very glad I never mentioned the pregnancies at the time, esp the 1st one. People can avoid you (esp if they become pregnant!), don't know what to say and feel embarrassed about saying something wrong etc. I also didn't want the constant 'how is the pregnancy going?' . Umm, well- and you have to repeat the story over and over abut what happened. Obviously, if all goes well, then its fine, but you never know.
I'm now pregnant again via IVF (4 weeks 3 days) and just starting this journey again. Being in isolation its much easier to just not mention it. I may let my mum know prior to 12 weeks this time, but ideally want a viability scan first.
Its a personal decision between you and your partner. How would you cope if things didn't go well and people ask questions? Some people find relatives/friends are very supportive, others find they disappear and don't know how to react. If you tell someone in confidence, will they actually keep it to themselves? Only you can decide what is best for you.