I ran two half marathons last year and my first full in October.
I'm planning on keeping up my same level of running as long as everything is going normally with the pregnancy. I'm a little slower, but doing well so far. I ran 10 miles last weekend and will keep up my 9-12 mile long runs on the weekends to prep for my race.
I'm signed up for a half marathon in March (signed up before I got pregnant) and I have a 10-mile race in April. I'm just planning on taking it slow and listening to my body.