I was diagnosed with Hashimoto's before I had any children. I, too, wondered if I'd have conception problems. I had my first at 26 without any difficulties. However, I had a long period of infertility after that, and then had two more kiddos - one at 33 and the next at 35. My last pregnancy was quite difficult, with a great deal of discomfort and then pre-eclampsia. I'm not sure that's really related to the thyroid stuff, though. As long as your doctor is keeping tabs on your hormone levels, it doesn't necessarily cause any complications. Congratulations!