L.N.
endocrinologist will answer all your questions.
hypo and hyper thyroidism are all inherited diseases, or caused by huge amount of stress (can't be in your daughter's case).
hypo is better than hyper except that it can cause huge weight gain unless put under control.
ask the endo to test for active graves disease or hashimotos.
i have grave's and have had my kids tested for it. nothing yet but my endo said it's something i need to accept that they may end up getting it too.
graves is a horrible disease.