glossary
What is foremilk and hindmilk?
Quick answer: Foremilk is the thinner, thirst-quenching milk at a session's start; hindmilk is the fattier milk that follows as the breast drains. They are one continuous milk, not two products: fat content simply rises as emptying progresses.
In practice
The classic worry, a true imbalance causing gassy green stools, mostly appears with significant oversupply and strict timed switching. For pumping moms the takeaway is simpler: a fully pumped bottle contains the whole spectrum, and watery-looking milk is normal foremilk, not a defect.
In Milk First
Every bag and bottle you add gets its best-by and use-by dates computed automatically from these exact rules, the oldest safe milk sits on top of the Use next queue, and a warning arrives the day before anything expires, while you can still act.
Milk First speaks this whole language for you: seshes logged in two taps, every bag on its correct clock.
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