If your periods are regular (
and you are not on the pill, patch, or
nuvaring) then there is at worst a small negative effect of being hypothyroid on pregancy outcome, but significant enough to warrant making sure your thyroid is under control . If your periods are irregular, the first step is to control your thyroid hormone levels, and then if your periods still are not regular use fertilit drugs to ovulate. If that is the case, I would recommend seeing an infertility subspecialist.