Hey mama! So typically one pumping session is around 15-20 minutes, but honestly it really depends on your body, some of my mum friends finish in 10 minutes, iba naman 30 minutes pa bago ma-empty talaga. As for how much you'll get per session, that varies too kaya huwag mag-compare, pero usually first time moms get anywhere from 1-4 ounces per session depending on demand and how often you pump. The best way is to pump until your breasts feel empty or until the milk flow slows down significantly, then you'll know you're done!