I live in the UK where standard practice is blood tests at the booking appointment to check for iron levels etc (no hcg tests) and a dating scan at 12 weeks. It seems like in other countries (particularly the US) there are lots of other blood tests/earlier scans etc. If your high risk here you get the early scans I think but judging by a lot of the posts I wonder whether the extra tests and checks are actually worth it. People seem to have a lot more questions after them about whether everything looks good 🤷🏻‍♀️