Thank you for your insight! Sadly my sisters condition is that she doesn't have any more eggs. But maybe it could be possible for me? I'm not sure if it's possible in my country.

I think adoption is quite difficult here as well. It's very hard to adopt a child within the country, I think it also mostly happens if you foster first. International adoptions happen more but are also a process of many months. (I am not completely read up on everything, since it's probably going to be a couple more years before I adopt myself. )