Fibroids and pregnancy

Has anyone ever had a large fibroid attached to the outside of their uterus during pregnancy, how did it go? When I went for my first scan she detected an 11cmx9cm fibroid attached to the outside of my uterus she said it won't harm the baby and she didn't seem overly worried but they're keeping me under the watch of the high risk team with extra checks throughout the pregnancy as the hormones can make the fibroid grow bigger. Just wondering if anyone else had experience of this and did all go well or what complications to expect?