First-Time Pumping: What Nobody Tells You (But Should)
Nobody hands you a guide to pumping when you leave the hospital. You’re expected to figure it out from a manual written by an engineer, a YouTube video with no sound, and the advice of your mother-in-law who pumped in 1989.
Here’s the practical version. The one we wish we’d had.
1. Your First Session Will Probably Disappoint You
This is normal. Many mothers produce very little or nothing in their first pumping session — even if they have a healthy milk supply. Your body takes time to learn to respond to a pump in the same way it responds to your baby. The let-down reflex is partly psychological as well as physical, and it can take multiple sessions to establish.
Don’t measure your worth as a mother by how many millilitres appear on the first go. Keep sessions short and consistent to start — 10 to 15 minutes is plenty while your body learns.
2. Flange Size Matters More Than Anyone Tells You
The flange (the cup that sits against your breast) needs to fit your nipple correctly. If it’s too small, it pinches. If it’s too large, too much areola is pulled in, creating soreness and reducing efficiency. The general guide: your nipple should move freely in the tunnel without rubbing the sides, and without significant areola being drawn in.
Measure your nipple diameter. Add 1–3mm. That’s your starting size. If your pump comes with multiple inserts, try both and see which feels better. O&K MUBY pumps come with multiple insert options for exactly this reason.
3. Suction Is Not the Same as Effectiveness
More suction does not mean more milk. It usually just means more discomfort. Start at the lowest comfortable suction level and only increase if it doesn’t feel like it’s doing anything at all. Most mothers find their most effective setting is one or two levels below their maximum comfortable level.
4. Timing Makes a Difference
Many mothers find they produce most in the morning — particularly in the first feed or pump of the day. If you’re building a freezer stash, the hour after your baby’s first morning feed is often the most productive time to pump.
Stress and tiredness genuinely affect output. A relaxed mother usually produces more than an anxious one. If you can, pump somewhere comfortable, with something calming to look at or listen to — and have a photo of your baby on your phone to look at if let-down is slow.
5. Clean Your Pump — But Don’t Obsess
After each session: disassemble the cup components that contact milk, rinse with cold water first (to prevent milk proteins from setting), then wash in warm soapy water or on the top rack of a dishwasher. Dry thoroughly before reassembling — this is important for hygiene and pump function.
The motor unit must never be submerged in water or put in a steriliser. Wipe the outside with a damp cloth if needed.
You do not need to sterilise after every single use once your baby is past the newborn stage — unless your healthcare provider advises otherwise. Thorough cleaning is sufficient.
6. Check the Duckbill Valves Regularly
The small silicone duckbill valves are the most commonly overlooked maintenance item. They wear out. When they do, suction drops and pumping becomes frustratingly ineffective. If your pump suddenly feels weaker, check the valves first — a split or deformed valve is the culprit more often than you’d think. Replacement valves are cheap and make a world of difference.
Finally: Be Kind to Yourself
Pumping is work. It’s physical, it’s time-consuming, and it can be emotionally loaded in a way that almost nothing else about early motherhood is. Whatever you produce — a full bottle, a few millilitres, nothing yet — your effort matters.
You’re doing it. And that is genuinely enough.