HCG levels?


I’m seeing a lot of posts about people having their hcg levels checked every couple of days and this being an indicator of a good/bad pregnancy.

Maybe it’s because I’m in the UK or something but we definitely don’t do that? Or is there a special reason why some people are checking their hcg and other people (me for example) don’t even have the option?

I’m just curious so if someone can clarify I would be really grateful ☺️