It looks like USA PoPs are all made with norethindrone / norethisterone. It is actually quite similar chemically to levonorgestrel. So, if you wanted to have a go with norethindrone, it would be a good indicator to see how you'd do on levonorgestrel. Not perfect though, you can do good on one and terrible on the other. So if your doc is willing to help you get the UK brand Norgeston or the Aus. brand Microlut that would be better.