I was diagnosed with Hasimoto's when I was 12, have been on synthyroid ever since. I had my son when I was 32 with no problems at all, it was a great pregnancy. I was due on a Monday, had apt that day, doc said if no baby by Friday come in for inducation, he was plenty big. I woke up in the night that Thurs night/Fri morning to go potty and was spotting, though I was not having any contractions. We went on to the hospital that morning, was induced, and had him at 339pm that afternoon.
A few months later when I went to my edocronologist apt, he got on to me because the ob/gyn office had changed my dosage when I was about 7 months along. They did this because they thought my TSH was off. My endo doc said it was a wonder my son was born without any thyroid problems of his own. He scolded me for letting them change it without him knowing and said never let anyone change it without consulting him first. I have always been on what a lot of doctors consider a high dosage, but my endo thinks it's fine. My thyroid doesn't work at all, so the synthyroid does it all.
I would definitely question why this doc wants to enduce.