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In a 20-minute pump session, many people collect 2–4 oz total, with wide variation by stage, pump, and frequency.

At two weeks after birth, most exclusive pumpers aim for 18–26 oz in 24 hours, building toward about 25–30 oz by one month.

At one week postpartum, many parents pump 30–60 mL per session, spread across 8–10 sessions to match a newborn’s intake.

Most parents don’t need to discard breast milk; dump only what you express while alcohol is in your system or if a clinician advises.

At one week postpartum, many parents pump about 300–450 mL per day, averaging 45–60 mL per session across 8–12 sessions.

At five days postpartum, typical milk output is ~480–720 mL per day, or about 60 mL per feed across 8–12 feeds.

Most established pumpers see about 25–35 oz (750–1,035 mL) per day, with session yield varying by stage and schedule.

With mature milk, expect roughly 2–4 oz per pump, and plan around 25–30 oz per day split across your schedule.

Most pumping parents reach 25–35 oz (750–1,035 mL) per day by week four; a typical session yields 2–4 oz (60–120 mL) from both breasts.