When I was working with lactation consultants to build up my supply when my baby was only a couple of weeks old, they all told me to pump for 10 or 15 minutes at a time. I had a nurse once tell me to pump until I wasn't getting any more milk, as long as it takes, and when I mentioned that to my LC, she said "no no no, only 15 minutes and then stop!!". I never asked why. Does anyone know?
Now that I'm pumping to feed my baby while I work, I totally ignore that advice and usually just let my breasts tell me when to stop pumping (when I stop getting milk), usually after about 20 minutes. I have started pumping on my commute, which is 30minutes long. My inclination is to just let the pump run the whole time. I kind of feel like the extra stimulation is good for my supply. It doesn't hurt to pump that long (although sometimes I will turn down the suction if I feel like my nipples are getting a little tired). I have struggled with low supply so I want to do what I can in that department. But I keep thinking about how the LCs always made a big deal out of timing sessions and never pumping longer than 15 minutes. Does anyone know why they tell you to limit the time on the pump? Is there any reason I need to be doing this now?