Before you read on
- Many parents who experience these risk factors go on to breastfeed successfully.
- Having one or more risk factors does not mean breastfeeding will be unsuccessful.
- If feeding is not going as hoped, it is not a reflection of your effort or your worth as a parent.
- Support from an IBCLC, your healthcare provider, or your baby's clinician can often identify what is getting in the way and build a feeding plan that works for your family.
How much should my baby be eating?
The simple chart: ounces and mL per feed, feeds per day, and daily totals from day 1 to 24 months.
Feeding calculator
Typical intake, feeds, duration, and diaper counts for your baby's age, weight, gestation, and feeding method.
Normal milk volumes
Birth through 24 months in millilitres and ounces, with expected variation for each age band.
What can affect milk supply
Preeclampsia and high blood pressure, hemorrhage, diabetes, thyroid, PCOS, age, breast surgery, and medicines — what's known, what's uncertain, and what helps.
Low milk supply action plan
One page, in order: quick checks, what to do today, what to track for 24–48 hours, and when to call your care team or an IBCLC.
My feeding journey
Identify risk factors before problems arise, and get an evidence-graded explanation of each one.
Postpartum recovery
Bleeding, healing, pelvic floor, mood, sleep, and returning to activity — what's typical and when to call.
How we label evidence
- Clinical guideline
- Stated in a major clinical guideline or protocol (ABM, AAP, ACOG, WHO, CDC).
- Systematic review
- Supported by systematic reviews or meta-analyses. Findings can still be mixed or based on observational studies.
- Limited evidence
- Some studies point this way, but the research is small, inconsistent, or mostly observational. Treat it as a signal, not a certainty.
- Clinical experience
- Commonly observed by lactation and perinatal clinicians. Not established in trials.
- Individual variation
- Ranges describe groups of babies and parents. Your baby can sit outside a range and still be completely fine.
One parent's experience is never presented as universal. Ranges describe groups; your baby can sit outside a range and still be perfectly well.
How milk production starts
Colostrum (lactogenesis I)
Clinical guidelineFrom roughly 16 weeks of pregnancy through the first 2–4 days after birth
Colostrum is thick, concentrated, and produced in small volumes — teaspoons, not ounces. It is high in protein, immune factors including secretory IgA, and helps the baby pass meconium. Its small volume matches a newborn's stomach capacity; it is not a shortage.
What can influence it
- Colostrum is present regardless of whether you feel 'full'.
- Hand expression often yields colostrum more effectively than a pump in the first days.
- Some parents express and freeze colostrum antenatally (often discussed from 36–37 weeks, especially with diabetes) — ask your provider whether that is appropriate for you.
Secretory activation — 'milk coming in' (lactogenesis II)
Clinical guidelineUsually 48–96 hours after birth; delayed onset is generally defined as beyond 72 hours
The delivery of the placenta causes a sharp drop in progesterone, which triggers a large increase in milk volume. Breasts typically feel fuller, warmer, and heavier, and milk changes in colour and consistency.
What can influence it
- Retained placental fragments can keep progesterone elevated and delay activation.
- Cesarean birth, hypertensive disorders, postpartum hemorrhage, diabetes, obesity, and significant stress or pain have all been associated with later onset in observational research.
- Frequent early milk removal (8–12 times per 24 hours) is the most reliably supportive action.
- Delayed onset is common and often temporary. It signals a need for closer follow-up, not a verdict.
Mature milk and autocrine control (lactogenesis III)
Clinical guidelineFrom about day 10–14 onward
Production shifts from being driven mainly by hormones to being driven mainly by milk removal. From here, how often and how completely milk is removed largely determines how much is made.
What can influence it
- Milk left in the breast slows production in that breast; effective removal increases it.
- Daily volume for exclusively breastfed babies plateaus around 750–800 mL and stays fairly steady from about 1 to 6 months.
- Supply built in the first 4–6 weeks correlates with later capacity, but supply can often be increased later with support.
Involution (weaning)
Clinical experienceWhenever milk removal decreases substantially, at any point
When removal slows, the breast gradually reduces and eventually stops production. Gradual weaning is usually more comfortable and lowers the risk of blocked ducts and mastitis.
What can influence it
- Dropping feeds one at a time, every few days, is the commonly recommended pace.
- Weaning can shift mood for some parents; this is described clinically and is worth naming to your provider if it is hard.
What influences milk supply
Milk removal (the biggest lever)
Clinical guidelineAfter the first two weeks, supply is governed mostly by how frequently and completely milk is removed. Effective latch or effective pumping matters more than duration. Long gaps between removals signal the body to make less.
Hormones
Clinical guidelineProlactin drives milk synthesis; oxytocin drives letdown. Progesterone's fall after placental delivery triggers secretory activation. Thyroid hormone, insulin, and cortisol all interact with lactation, which is why thyroid disease, diabetes, and PCOS can influence supply.
Supply and demand
Systematic reviewFeeding on cue and responding to increased feeding behaviour (rather than stretching intervals) is associated with better supply outcomes. Routinely replacing a feed without removing milk reduces the signal.
Sleep
Limited evidenceSevere sleep deprivation is associated with lower wellbeing and can make letdown harder, but sleeping longer stretches does not by itself fix or break supply. Night feeds matter because prolactin is higher overnight and because they keep removal frequent.
Stress and pain
Limited evidenceAcute stress and unmanaged pain can inhibit oxytocin and make letdown slower — often experienced as 'less milk' when what changed is milk release, not milk production. Skin-to-skin, warmth, privacy, and adequate pain control help.
Medical conditions
Systematic reviewHypothyroidism, PCOS, diabetes, retained placenta, hypertensive disorders, postpartum hemorrhage with Sheehan syndrome (rare), and insufficient glandular tissue can all affect production. These are medical variables, not personal failures, and several are treatable.
Hydration and diet
Limited evidenceDrinking to thirst is adequate. Forcing extra fluids beyond thirst has not been shown to increase supply. Very low calorie intake can reduce supply; ordinary dietary variation does not.
Galactagogues (herbs and medications)
Limited evidenceABM's protocol concludes evidence for herbal and pharmaceutical galactagogues is limited and inconsistent, and that they should never replace addressing milk removal and latch first. Prescription options have side effects and require clinician oversight.
Individual variation
Individual variationStorage capacity differs enormously between parents. A parent with smaller storage capacity may need more frequent feeds to make the same daily volume — that is anatomy, not inadequacy.
When to contact your care team
- Fewer wet or dirty diapers than expected for your baby's age
- Baby is very sleepy, hard to wake for feeds, or too weak to feed
- Baby has not regained birth weight by about 10–14 days, or is losing weight after day 5
- Dark urine, brick-dust (orange) urine after day 3, or no stool for 24 hours in the first weeks
- Jaundice that is deepening, or that reaches the belly, arms, or legs
- Pain with feeding that does not improve with latch adjustments
- Signs of mastitis: fever, chills, a red or painful area of the breast, feeling flu-like
- For you: heavy bleeding (soaking a pad an hour), a severe headache, vision changes, chest pain, shortness of breath, calf pain or swelling, fever, or thoughts of harming yourself or your baby — these need urgent care
In the US you can call or text 988 for mental-health crisis support, or 1-833-TLC-MAMA for the National Maternal Mental Health Hotline. For anything life-threatening, call 911.
Evidence and review
- Date last reviewed
- 2026-07-15
- Next review due
- 2027-07-15
- Clinical reviewer
- Reviewed by an IBCLC and a perinatal clinician for educational accuracy
References
- Academy of Breastfeeding Medicine (ABM) — Clinical Protocols (supplementation, galactogogues, mastitis spectrum, ankyloglossia, late preterm infant)
- American Academy of Pediatrics (AAP) — Policy Statement: Breastfeeding and the Use of Human Milk
- American Academy of Pediatrics (HealthyChildren.org) — Amount and Schedule of Infant Formula Feedings; Practical Bottle Feeding Tips
- Centers for Disease Control and Prevention (CDC) — Infant Formula Preparation and Storage; How Much and How Often to Feed
- World Health Organization (WHO) — Safe Preparation, Storage and Handling of Powdered Infant Formula
- American College of Obstetricians and Gynecologists (ACOG) — Optimizing Postpartum Care; Breastfeeding Challenges; Gestational Hypertension and Preeclampsia
- World Health Organization (WHO) — Infant and young child feeding; postnatal care recommendations
- Centers for Disease Control and Prevention (CDC) — Breastfeeding: special circumstances, milk storage, maternal diet, alcohol and tobacco
- Cochrane — Reviews on early skin-to-skin contact, kangaroo mother care, frenotomy, and pelvic floor muscle training
- LactMed (NIH) — Drugs and Lactation Database
- US National Maternal Mental Health Hotline — 1-833-TLC-MAMA (1-833-852-6262), 24/7
Educational only. This is not medical advice, a diagnosis, or a substitute for care from your provider, your baby's clinician, or an IBCLC.
Educational only. Not medical advice. In an emergency, call your provider or local emergency services (911 in the US). Labor Lens is not for urgent care.