Should I Continue Thyronorm Even After The Thyroid Is Normal?

Hello i am 29 now. I was diagnoised Sub clinical Hypothyroidism in 2008. Once i took 25 mcg of tablet i was normal in 6 months time. Now also my thyroid is within the normal range. I regularly get it checked once in 4 months. I am having trouble conceiving, do you think i should continue thyronorm even after it is normal? Please suggest