I just went back to work this week and am pumping three times in the 10 hours I'm away from DD - 9:30, 12:30 and 3:30. (I nurse her at 6:30am, 6:30pm and bedtime.) At the first pump, I have been getting around 9-10oz but then at the next two pumps, I struggle to get 4-5oz. It's more than enough to cover her day care needs at this point, but is that normal for output to decrease so dramatically over the course of the day? It worries me that she might not be getting enough at her nighttime nursing sessions.