It all depends on whether you want to be perfectly prepared for IVF or not.
The ideal TSH
before planning for pregnancy
is when your TSH is less than 2.5. But you could conceive with a TSH of 6.5 as your physician have increased the dose. The risk is for miscarriage
which will be approximately around two times when your TSH is 6.5.
Hope I have answered your question. If you have any further questions I will be happy to help.
Dr Ajish TP