Your supply has not gone up because the breast does not count feeds, hunger or effort. It counts milk removed. Your baby takes what you currently make, the top-up covers the shortfall, and nothing in that sequence ever tells your breasts that more was needed. That is a mechanism, not a failure of commitment — you have been running the hardest version of this for two months.
There is a second answer that most writing on this leaves out, and at two months with low supply from the very first week it belongs on the table: sometimes the cap is physical, and frequency is not the lever.
Not medical advice — consult your lactation consultant or paediatrician for personal guidance.
What the breast is actually counting
"Supply and demand" is a decent slogan and a poor description. The signal is drainage. A 1998 review of autocrine control of milk secretion in Biochemical Society Symposia reports that the rate of milk secretion is "regulated by frequency and completeness of milk removal", working through chemical feedback inhibition by a constituent of the milk itself — and proteins that do this have been isolated from human milk as well as from goat and cow milk. Milk sitting in the breast is a chemical instruction to slow down. Milk taken out removes that instruction.
Which makes the lever mechanical rather than motivational. A 2006 clinical review in Australian Family Physician states that in many cases milk supply can be increased by frequent, regular milk removal. Frequency and completeness. Not minutes, and not trying harder.
Half an hour at the breast is a duration, not a measurement
This is the specific gap in the picture you have. A baby can stay latched for twenty-five minutes and move a very small amount of milk — comfort-sucking, dozing, a shallow latch, or simply a breast that has little left to give. The clock tells you nothing about volume.
What does say something, during the feed: the NHS says feeds should begin with a few rapid sucks followed by long, rhythmic sucks and swallows with occasional pauses, cheeks staying rounded rather than hollow, and you should be able to hear and see your baby swallowing. Breasts that feel softer afterwards than before are also a sign that something left.
Over days rather than minutes, the honest measures are output and growth. The NHS lists, among the signs a baby is feeding well, steady weight gain after the first three to four days, and at least six heavy wet nappies in each twenty-four-hour period from day five onwards. Those numbers are also what a clinician will use to decide whether anything can safely change.
The bind, named honestly
The top-up is simultaneously the thing keeping your baby fed and the thing holding your supply flat. The NHS states that topping up with formula means the baby will breastfeed less often, which signals the breasts to start producing less milk. Both halves of that sentence are true at once, which is why this is a genuine bind rather than an error. Your baby is fed. That is the job, and you are doing it.
The way out is not a single decision but a supervised slope. The NHS advises reducing the number of bottles gradually as supply rises, and — if you are already doing everything and the supply is still low — asking your midwife or doctor to refer you to a breastfeeding specialist who can watch how your baby is actually feeding. This is the boundary of what an article can do for you. Stepping top-ups down in a baby whose weight gain may already be slow is a clinical decision that needs someone who can weigh your baby and watch a whole feed. Please do not run it off a web page, including this one.
And if pumping is genuinely out of reach — no window, no energy, and a body that shuts down the moment you sit still at night — the free option is your hands. The NHS notes that hand expression needs only your hands and a container rather than a shop-bought pump, and that it is useful when you want to stimulate milk production. No assembly, no sterilising a kit at three in the morning, no setup to abandon. A few minutes after a feed is a removal the breast counts. (Choosing a pump, when that becomes possible, is a separate question.)
Sometimes it is not about demand at all
This is the part you deserve rather than another lap of the loop. A 2016 review in the American Journal of Physiology: Endocrinology and Metabolism concluded that although it has long been assumed infant demand is the primary regulator of milk production, evidence from animal and human studies shows a diverse array of maternal factors also affect how much milk a woman makes.
Low supply from the very beginning is the pattern most worth investigating. Some of what an assessment would consider:
| What it is | Why it is on the list |
|---|---|
| Insufficient glandular tissue (breast hypoplasia) | A 2021 systematic review in Breastfeeding Medicine states breast hypoplasia is one reason women may be inherently unable to make a full supply |
| Retained placental tissue | A case report in the Journal of Human Lactation records no milk despite extensive stimulation until placenta increta was diagnosed and resolved |
| Thyroid dysfunction | An Indian thyroid-clinic study in the Journal of Postgraduate Medicine found reproductive failure including failure of lactation in 37.5% of hypothyroid cases against 16.3% of euthyroid ones |
| PCOS, diabetes, raised BMI | A 2021 review in Seminars in Reproductive Medicine reports evidence of delayed lactogenesis and reduced breastfeeding duration with these conditions |
| Previous breast surgery, heavy postpartum bleeding | The Australian Family Physician review names breast reduction surgery and postpartum haemorrhage as maternal causes |
| Routine medicines | A crossover trial in the British Journal of Clinical Pharmacology found a single dose of pseudoephedrine significantly reduced milk production |
In mammary hypoplasia specifically, a 2013 review in the Journal of Midwifery and Women's Health explains, hormone levels are often normal and the glandular tissue itself is what is lacking — so the breasts may be widely spaced, asymmetric or tuberous while every blood test reads fine. Separately, a 2022 review in Nature Reviews Endocrinology describes how lactation is switched on by progesterone falling after the placenta is delivered, which is the reason anything that interrupts that drop is worth asking about.
None of this is a diagnosis of you. It is a list to take to a lactation consultant or your paediatrician, with one sentence: low from the first week, still low at eight weeks, topping up every feed. That sentence is the referral.
What is already true
You are feeding your baby. The milk she gets from you is not cancelled by the milk she gets from a bottle, and two months of nursing before every top-up is not a failed attempt at something — it is the thing itself. Whatever the assessment finds, it will not change that.
Related: stopping triple feeding deliberately, a supply that drops after being established, milk that was slow to come in at the start, galactagogues and domperidone, and whether breast size affects supply.
