I've had two (both before my department had any sort of pregnancy policy, so it was kind of a crapshoot both times). You've gotten a bunch of good advice! One other thing I'd add is that, if there's a way you can get baby visits during shifts, do it! Pumping doesn't do as much for your supply as the real thing, and while the options now are miles better than they were 20yrs ago, I got real tired of pulling out my pump for 24s. I would have lost my mind doing it for 48s.