My pregnancy was without one problem. I actually felt great! And, yes, I did not feel any back pain. My delivery was fine and with an epidural. I have a Harrington rod from 1982 and only have mild symptoms of discomfort. I would only recommend to watch your weight. I was always on a thin side and I think that helped during the pregnancy, I gained 25 lbs. Before I got pregnant, I went to my surgeon and had an x-ray taken. My fusion and spine looked very strong and healthy. Congratulations and keep up the good spirit, your baby will appreciate it.