Hi Vickylee
I was diagnosed with an underactive thyroid about 4 years ago. Unfortunately I also have PCOS but this was my main problem not conceiving and not the underactive thyroid. If you drink your pills everyday, your thyroid should be "normal" and not be a problem - well, that was what my Fertility specialist told me. I am on Euthyrox and when I fell pregnant with my daughter, the dr tested me every 3 months to make sure it was normal, which it was.
All the best
Dellie