When to announce?

When did you announce to family and friends you were pregnant? What week, and why?

Currently I'm 5W 5D and the only people who know are immediate family, because I did <a href="https://glowing.com/glow-fertility-program">IVF</a> it was unavoidable. They knew my transfer and test date etc. but extended family and friends have no idea I was even trying so it's going to be a bit of a surprise for everyone else.