What happens if you get pregnant during your PhD or postdoc research? (I'm an EU student, and pay for the living costs myself). Would I receive money from UK or my home country? Has anyone experience of research + children? Is it totally impossible or just very hard?

A friend of mine had two children during her PhD studies - took her 7 years from beginning her project until graduation but she got there and has no regrets. Not sure about the financial situation but I think her student registration was temporarily suspended while she was on maternity leave (so she didn't have to worry about exceeding the maximum allowable time for completion of studies).

I had children during my studies. Wailing children not conducive to studies, but wouldn't be without them. It's not impossible but VERY hard. You can do it, you just need to be better organised.