Yes, I suppose she might take the subsitute for the thyroid. And I know a lot of people who is taking pills because they've hipo or hiperthyroidism. In fact, as I say, I cross my fingers I last to have to, as I've been told I'll eventually have some problem (probably hipo).
And yes, I know it's important to control it at pregnancy. The real problem is when you don't know you have problems and don't medicate yourself... being pregnant. But if you know, your doctor knows, and you are well controlled, there might be no problem so far
It's weird, how a huge amount of people I know have some type of thyroid problems... and I don't think Chernobyl reached so much here. I suppose the polution, our way of life, what we eat... everything is changing us in all levels, and thyroids might be very sensitive to it all...