C.M.
I don't know how common it is but I did spot for the first couple months. It was very alarming and worrying and the Docs didn't know why. An ultrasound was done and there weren't any obvious problems. It was classified a "threatened miscarriage" so don't freak-out if that's what they called it. I just took it very easy until it stopped. No one ever told me that it might actually not be a problem and I was a bit of a wreck the whole time. I had no other problems with the pregnancy.