hi I noticed that my pumping yield is vastly different if I pump 30mins vs 45to60mins...is it because my breasts is not responding well to the pump or is it because I pump longer? for 30mins I get about 100to120ml...but if I pump 45to60mins I get 180ml....that's almost 50% more..thinking whether I should change my pump..currently using spectra 9+

Vô danh

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wow...I think I should really get an s1 instead...I have read reviews that 9+ doesn't drain properly..wondering is this causing my low supply...