Establishing Feeds for Preterm Babies

Take-home

This guide is the partner reading for the 31–33 weeks preterm journey and the late preterm journey.

---

The big picture

Feeding a preterm baby is often the rate-limiting step for going home. In the second half of the stay, breathing, sugars and jaundice are often settled; feeding maturity is commonly what takes the extra time. Why?

• Suck, swallow and breathe are three reflexes that have to coordinate, and that coordination matures in stages from around 32 weeks corrected age and is reasonably reliable from 34–36 weeks
• Stamina for a full feed builds slowly; early feeds may finish before baby gets enough volume in
• Energy balance matters: a baby who burns more energy feeding than they take in won’t gain weight
• Breastfeeding takes longer to establish than bottle feeding for most preterm babies, but is well worth the time

The team manages this with a stepwise progression built around your baby’s cues, and a safety-net of NG-tube feeds whenever sucking isn’t enough.

---

The four phases of feeding

Phase 1: IV glucose (first 24-48 hours). A short course of 10% dextrose through a small IV cannula keeps blood sugars steady while feeds establish. For most late preterm babies, IV fluids are short-lived or not needed at all. (Babies needing more complex IV nutrition, full parenteral nutrition or a PICC line, are usually managed in a tertiary NICU rather than at Frances Perry House.)

Phase 2: Trophic feeds (gut wake-up, day 1-3). Tiny milk volumes (1-2 mL every 2-3 hours) start in the first day; larger, more stable babies often move to larger volumes from the start. Expressed colostrum and breast milk are first-line, preterm formula otherwise. The goal here is to wake up the gut rather than provide calories; the calories come later as feeds build up. Given via an NG (nasogastric) tube through the nose into the stomach: comfortable, leaves the mouth free, allows scheduled feeds.

Phase 3: Building NG feeds + starting suck practice (from day 1-2 onwards). Volumes increase by 20-30 mL/kg/day as tolerated. The IV cannula comes out as milk feeds rise and the baby no longer needs the dextrose. Sucking practice starts in parallel, see the regimen below. Most babies reach full milk feeds within a week (faster for late preterm).

Phase 4: Transitioning to all-suck feeds (typically 35-37 weeks corrected). The structured suck-feed progression below. The last NG tube comes out when baby is consistently taking the full required volume by suck and gaining weight, for most preterm babies that’s around 35-37 weeks corrected age.

---

The bottle-feeding regimen

If your baby is having bottle feeds (expressed breast milk or formula), the team progresses through these stages, usually 24–72 hours each before stepping up, though going at baby’s pace matters more than the timetable.

The standard suck-feed progression

1. One suck feed in three (1 suck + 2 NG): typically 1 bottle in 24 hours plus all the NG feeds. Used to introduce sucking gently.
2. Alternate suck feeds (1 suck, 1 NG, 1 suck, 1 NG…): about half the feeds by suck. Most babies are doing this from around 34 weeks corrected.
3. Two suck feeds in three (2 suck + 1 NG): most feeds by suck; NG is the backup for tired or asleep feeds.
4. All suck feeds, 3-hourly: eight feeds per 24 hours by suck. NG comes out at this point in many cases.
5. All suck feeds, 4-hourly: six feeds per 24 hours, larger volumes per feed. The going-home pattern.
6. Going home

This isn’t a rigid script. Some babies skip steps or move backwards for a day during illness or growth spurts; the team will adjust the plan around what works for your baby.

What to look for during a suck feed

A good preterm bottle feed is calm and coordinated, not hurried. Watch for:

• Calm body and steady breathing: colour stays pink, no oxygen drops on the monitor
• Rhythmic suck-swallow-breathe: usually a burst of sucks, a swallow, a breath, repeat
• Pacing: pauses between suck bursts as baby breathes; the bottle is held angled so the milk flow doesn’t overwhelm
• Stop signs: splaying fingers, turning head away, becoming sleepy, dropping oxygen, slowing the heart rate. These mean baby has had enough, for now.

Slow-flow teats and side-lying feeding

• Preterm babies need slow-flow teats so milk doesn’t pour faster than they can swallow safely
• Side-lying feeding, baby on their side, bottle horizontal, slows the flow further and reduces aspiration risk; this is often used for preterm and recovering babies

---

The breastfeeding journey

Breastfeeding a preterm baby looks different from breastfeeding a term baby. The progression is less stepwise and more cue-led, with NG top-ups as the safety net. Key principles:

Breastfeeding pattern for preterm babies

Stage 1: Skin-to-skin and breast contact, no expectation of feeding

• Even babies on CPAP and NG feeds can have skin-to-skin time with mum (or dad)
• Baby smells the breast, may nuzzle, may lick or root, all positive signs
• This is not failed feeding: it is the foundation of all later feeding
• Express afterwards to maintain supply

Stage 2: Non-nutritive sucking at the breast

• Once mum is comfortable and baby is stable, baby can be brought to the breast after expressing (so the breast is softer and milk flow is gentler)
• Baby may attach, suck briefly, or simply rest at the breast
• Quality over quantity here is critical: even 30 seconds of good attachment is a win
• Test weighing (weighing baby before and after a breastfeed) is sometimes used to estimate milk transfer

Stage 3: Active breastfeeding with NG top-ups

• Baby starts to actively transfer some milk
• After each breastfeed, the NG top-up gives whatever volume the team has worked out for that feed
• The amount transferred at the breast grows over days to weeks
• Cue-based: feeds happen when baby shows alert/feeding cues, with NG fill-in if needed at scheduled times

Stage 4: Increasing breast feeds, decreasing NG top-ups

• Some feeds go straight from breast with no top-up (when transfer is good)
• Others still need NG top-ups (when baby is tired, sleepy, or supply is lower than demand)
• The pattern is usually: breastfeeds during the day (when baby is more alert and mum is around), NG-only or expressed-bottle feeds overnight until the rhythm is reliable

Stage 5: All breast feeds (with or without expressed top-ups at home)

• The NG comes out
• Some families stop here; others continue with expressed bottle top-ups at home for a period to support weight gain
• Many late preterm and 31–33 week babies are discharged on a partial pattern: one or two breastfeeds plus the rest as bottles. See transitioning from partial to full breastfeeding at home below for the typical “swap one bottle for a breast feed each week” plan.
• Long-term breastfeeding outcomes for preterm babies are similar to term babies once they are home and feeding well

Why quality of suck feeds matters more than quantity early on

This is the single most important message for breastfeeding mums:

In practice this means:

• Stop the breastfeed when baby disengages: don’t wake them to keep feeding
• Top up the rest of the volume by NG: that volume isn’t lost, it’s delivered the easy way
• Try again 3 hours later: same pattern; calm short feed + NG top-up
• Volumes will grow over days as baby’s stamina and coordination improve

This is the opposite of the pressure mums often feel (“baby has to take the whole feed or I’m failing”), and the evidence backs the team: breastfeeding rates at discharge and 6 months are higher with cue-based, quality-led progression than with volume-driven pushing.

---

Why breast contact matters: even before milk transfers

Skin-to-skin and time at the breast, even when baby isn’t taking any milk yet, has measurable effects on:

• Milk supply: the act of being near baby triggers oxytocin release, which drives prolactin and supply
• Breastfeeding readiness: baby learns the smell, taste and feel of the breast, building positive feeding associations
• Milk composition: research shows that mum’s milk composition changes in response to baby’s contact, including immune factors specific to whatever pathogens baby has been exposed to
• Parental wellbeing: skin-to-skin reduces postnatal anxiety and depression scores
• Length of stay: preterm babies who get more skin-to-skin tend to feed earlier, gain weight faster, and go home sooner

This is why our team actively facilitates early parent–baby contact: including early skin-to-skin where conditions allow, and structured kangaroo care sessions throughout the stay. See the late preterm journey and the 31–33 weeks preterm journey for more on the developmental-care framework.

---

Expressing to protect supply

If you want to breastfeed, expressing is the foundation of supply during the slow-feeding-baby phase. The standard:

Expressing schedule for a preterm baby

• Start expressing within the first 1–6 hours after birth, even before you see your baby; hand-express colostrum onto a syringe
• Aim for 8 expressing sessions every 24 hours including at least one between midnight and 6 am: this is the time-window when prolactin levels are highest and supply is set
• Continue this 3-hourly pattern for the first 2–3 weeks: supply is most vulnerable then
• Use a hospital-grade double pump: most SCNs/NICUs provide one; the Australian Breastfeeding Association can advise on home options
• Expect supply to vary: it’s normal to have low days; consistency over time is what matters
• Hand express in addition to pumping, useful at the end of a pump session to clear the breast more fully
• Save and label every expressed millilitre, even 5 mL of colostrum is gold for a preterm gut

The lactation consultants in your unit are the experts here. Ask them early and often.

---

Reading your baby’s cues

Cue-based feeding works because babies tell you what they need, if you watch for it.

Watch closely — MCH Line 13 22 29 for advice

Baby is ready to feed (try a suck feed now)

• Awake and alert eyes
• Hands to mouth
• Mouthing or rooting movements
• Coming out of a deep sleep cycle
• Calm, organised body posture

Baby is feeding well (continue)

• Steady rhythm of suck-swallow-breathe
• Pink colour, steady oxygen levels on the monitor
• No splaying fingers, no head turning away
• Audible swallowing every few sucks

Baby has had enough (stop and offer NG top-up)

• Slowing or stopping sucking
• Splaying fingers, turning head away
• Sleepy / closing eyes
• Falling oxygen levels, falling heart rate
• Subtle colour change

Baby isn’t ready right now (don’t force; try again next feed)

• Deeply asleep (state 1 sleep)
• Floppy or low energy
• Recently had a procedure or examination
• Recovering from a recent feed

This is also the foundation for the unsettled baby guide, cue-based reading carries through after discharge.

---

When the team advances the regimen

The decision to step up to the next stage is based on:

• Volume taken at suck feeds: consistently taking the planned amount without exhausting baby
• Energy through the feed: staying organised, no oxygen drops or apnoeas
• Weight gain: at least 15–20 g/kg/day
• Cues: baby asking for feeds, alert at appropriate times
• Mum’s readiness if breastfeeding, supply, comfort, stamina

It is normal for a baby to stay at the same stage for several days, particularly around the late-preterm window. It is also normal for them to step backward briefly during illness, growth spurts, or after a tiring procedure. The team will adjust.

---

Common challenges

Baby falls asleep at the breast / bottle quickly

• Most common in late preterm and very preterm babies, completely normal
• Stop the suck feed when baby disengages, top up by NG, try again next feed
• Skin-to-skin between feeds increases alertness for the next feed
• See breastfeeding support for general settling-and-rousing techniques

Oxygen drops during feeds

• Suggests baby is using more energy than they can sustain, slow the flow (slow-flow teat, side-lying, paced bottle feeding)
• Stop and let baby recover; reduce feed volume or duration; top up with NG
• Common at 32–34 weeks corrected; settles as coordination matures

Apnoeas after feeds

• Common in preterm babies; the breathing centre is still maturing
• Apnoea timing relative to feeds is observed; if persistent, caffeine is continued for longer (sometimes well past 34 weeks corrected for breast-feeding babies)

Slow weight gain

• The team will check feed volume, energy density (preterm formula or breast-milk fortifier may be added), and look for underlying causes (infection, reflux, anaemia)
• Don’t over-interpret a single low gain day, patterns over a week are what matter

Reflux during suck-feed transition

• Late preterm and 31–33 week babies often have visible spilling as feeds increase
• Most is normal physiological GOR, see reflux. Pathological reflux (GORD) is uncommon but watched for.

Mum’s supply drops during a long stay

• Common, treatable. Lactation consultant input early; pumping schedule review; sometimes supply-supporting medication (under medical supervision)
• Skin-to-skin is the simplest and most effective intervention

---

Going home: the feeding criteria

Babies go home when they have:

• All feeds by suck (breast and/or bottle), without an NG tube, for at least 24–48 hours
• Reliable weight gain (15–20 g/kg/day on average over the previous week)
• Coordinated feeds without oxygen drops or apnoeas
• A feeding plan: volumes, intervals, signs to watch
• Family confidence in feeding, settling, and what to do if a feed doesn’t go well

A small number of late preterm and 31–33 week babies go home with NG feeds at home under specialist supervision, with parents trained to pass and use the NG tube. This is uncommon but available where it’s the right plan for the family.

---

At home: the first weeks

Once home, the feeding pattern continues to mature:

• Cluster feeds in the evening are normal and common
• Growth spurts at around 2 weeks corrected, 6 weeks corrected, 3 months corrected, feeds become more frequent for 24–72 hours
• Use corrected age for feeding milestones for the first 12 months (late preterm) or 2 years (31–33 weeks): see neurodevelopmental milestones
• MCH visits check weight, length and head circumference at each contact
• First paediatric review (book for 6 weeks after discharge; book early, appointments can take a few weeks) looks specifically at feeding and growth

Most preterm babies do beautifully at home once feeding is established. If you have concerns, the feeding calculator gives you per-feed volume guidance for formula or top-ups, and the breastfeeding support guide is the broader companion.

---

Transitioning from partial to full breastfeeding at home

Many preterm babies go home doing some breast feeds and some bottle feeds: typically 1–2 breastfeeds a day plus bottles of expressed breast milk (or formula). It’s a normal, successful discharge pattern that preserves breastfeeding and protects supply. Many families stay at this mix long-term: a legitimate choice; any breastfeeding counts as a win.

For families who want to work toward fully breastfed, a slow, planned transition is far more likely to succeed than trying to switch all feeds at once.

How to do it, week by week

Step-by-step plan

1. Start where you are. Most families discharge with one or two breast feeds a day plus four or five bottles. That’s your baseline.
2. Each week, pick one bottle to swap. Choose a feed where your baby is alert and interested: usually a mid-morning or early-afternoon feed when you are well-rested and there’s no time pressure.
3. Try the breast first at that feed. Let baby feed as long as they are working at it, don’t time-limit.
4. Top up if needed. If baby still seems hungry or doesn’t take a full feed, top up with the bottle of expressed milk you would have given. The top-up shrinks naturally as breastfeeding strengthens.
5. Express that bottle’s volume initially to maintain supply during the change. Once your supply has adjusted (usually a week), you can drop that pumping session, but don’t drop them all at once.
6. Hold the new pattern for a week. Watch wet nappies (aim for 4–6+ heavy ones in 24 hours), weight gain (your MCH nurse can check), and your baby’s contentment after feeds.
7. The next week, swap a second bottle. Same process. Keep going until you reach fully breastfed.
8. Expect plateaus. Some weeks your baby may not be ready to swap, keep the current pattern for an extra week, and try again. There’s no rush.

What to watch for

A few practical tips

• Skin-to-skin at every feed while you transition, even if just for a minute or two before latching. Strengthens supply, settles baby, makes the breast feel familiar.
• Express on the days you are still bottle-feeding to keep supply going; you can drop sessions gradually as breastfeeds increase.
• Watch out for sudden full-supply requests. If you swap two or three bottles in one week instead of one, supply may not catch up, and weight gain can stall. Stick to one swap per week.
• Cluster feeds in the evening are normal and not a sign of low supply. They are baby’s way of telling supply to ramp up.
• Hold the dummy until breastfeeding is fully established if you can, but if your baby is already used to one (which is common after a SCN stay), it’s fine to continue.
• A growth check at 1, 4 and 8 weeks corrected by your paediatrician or MCH nurse keeps the transition on track.

When to stop, slow, or seek help

There is no virtue in pushing through if it isn’t working. Common reasons to slow or pause the transition:

• Weight gain stalls or weight drops: usually a sign baby isn’t transferring enough at the breast yet; a feeding review will tell you whether to slow or to add expressing back in
• You are exhausted: if the rhythm is wearing you down, the partial-breastfeed pattern is fine to stay at long-term
• Returning to work: many families plan the transition around what their work life will support; partial breastfeeding + expressed-bottle top-ups at childcare is a common, sustainable plan
• Mental health: perinatal anxiety and depression are common in new mothers (1 in 5–7 depending on definition, per PANDA) and often interact with feeding stress. PANDA, Beyond Blue and your GP support new parents, see when to seek help.

If the transition isn’t working out, going to fully bottle/formula isn’t a failure: your baby has had the foundational benefits of breast milk through the early weeks. Mixed and formula feeding through the rest of infancy is also legitimate and supported.

When to expect to be fully breastfed

For a typical late preterm baby starting partial breastfeeding at home, fully breastfed by around 2 months of corrected age is a realistic target if everything goes well. For 31–33 week babies, 3–4 months corrected is more typical.

Many families are still doing some bottle feeds at 6 months, and that’s also fine. There is no “right” endpoint other than the one that works for your family.

---

Common questions

“How long until my baby takes a full feed?”

For most late preterm babies, the bottle-feed transition takes a week or two once it starts. For 31–33 weeks, expect 2–4 weeks between starting suck feeds and being all-suck. Breastfeeding usually takes a little longer than bottle feeding to fully establish.

“Why is the team starting bottles when I want to breastfeed?”

Most SCN/NICU units offer some bottle feeds alongside breastfeeding for preterm babies during the establishment phase, typically of expressed breast milk. This protects supply (regular pumping), gets calories into baby reliably, and doesn’t harm long-term breastfeeding outcomes when done with care. Ask if you’re unsure about the plan: every team is happy to discuss; some will use cup-feeding or paced bottle-feeding rather than standard bottles to protect breastfeeding learning.

“What is ‘test weighing’, is it accurate?”

Test weighing is weighing baby before and after a breastfeed; the difference is the milk transferred. Modern digital scales make this reasonably accurate. It’s a useful tool for planning NG top-ups during the breastfeeding establishment phase but not used at every feed and not after discharge.

“Should I use a dummy/pacifier?”

Yes, non-nutritive sucking on a dummy during NG feeds is well-supported in preterm babies. It improves feeding readiness, helps the suck-swallow-breathe pattern mature, and provides comfort. Dummies are generally introduced once breastfeeding is well-established (around 3–4 weeks for term babies, but earlier for preterm babies if breastfeeding is going well).

“Will doing both breast and bottle cause nipple confusion?”

This was once thought to cause “nipple confusion”. Current evidence is more reassuring, the great majority of preterm babies who do both successfully transition to exclusive breastfeeding at home if mum wants to. The key is expressing to maintain supply and frequent skin-to-skin to build the breast association.

“Why does my baby seem to feed more easily on the bottle?”

Bottles can be physically easier, flow is steady and predictable. The breast requires baby to elicit the letdown, work harder for variable flow, and coordinate around mum’s anatomy. This is a normal preterm experience and does not mean breastfeeding will fail. Ongoing skin-to-skin, breast contact, and lactation consultant input help.

“We’re going home doing 1–2 breastfeeds plus bottles, how do I get to fully breastfed?”

The plan that works for most families is swapping one bottle for a breast feed each week, in a calm planned way, with skin-to-skin at every feed. Over 4–6 weeks you usually arrive at fully breastfed. See the transitioning from partial to full breastfeeding at home section above for the full week-by-week plan, what to watch, and when to slow down or seek help.

“What if I want to formula feed?”

That’s a legitimate choice. The team supports it without judgment. Practical points: preterm formula is sometimes used for the first weeks, then transitioned to standard infant formula closer to discharge; the same NG-to-suck progression applies; volumes are higher than for breastfed babies because formula is less calorie-dense than fortified preterm breast milk.

“Can my baby breastfeed in the car seat for the trip home?”

No, feeding in a car seat (or any seat where baby isn’t in your arms) increases the risk of choking and reflux. Plan for breastfeeding stops on the way home, or have an adult hold baby in skin-to-skin for short bottle feeds during a stopped break.

“What about reflux when feeds are big enough to come back up?”

Common and usually settles. See reflux for the GOR vs GORD distinction, positional measures, and what isn’t worth medicating.

---

Related reading

Companion guides

• The 31–33 weeks preterm journey
• The late preterm journey (34–36+6 weeks)
• Breastfeeding support
• Tongue tie, sometimes a contributor to slow feeds
• Reflux in babies
• Hypoglycaemia management

After discharge

• Common newborn findings
• Unsettled baby (crying peak)
• Neurodevelopmental milestones
• Feeding calculator

External

• Safer Care Victoria — Enteral feeding for neonates
• Safer Care Victoria — Breastfeeding for neonates
• Safer Care Victoria — Developmental and family-centred care of infants
• Royal Women’s Hospital — Newborn Intensive and Special Care

Worried about how feeding is going?

A structured review by the paediatrician and lactation consultant can look at the pattern, volumes and your baby's cues, then set the next step.