Clinical overview
Infant feeding is one of the highest-leverage conversations in the whole of antenatal and postnatal care, and in South Africa it sits at the intersection of nutrition, infection (HIV in particular), poverty, and powerful commercial pressure. The decisions made in the first hour and the first weeks of life shape childhood survival, growth, immunity, neurodevelopment, and the mother's own postpartum recovery. For the FCOG(SA) candidate the objective verb is discuss — meaning you must be able to lay out the options fairly, weigh their risks and benefits in a given clinical and social context, counsel a specific woman to an informed choice, and know the few situations where one option is medically mandated and the rest contraindicated.
The headline numbers frame the stakes. Globally and in South African policy, exclusive breastfeeding (EBF) for the first six months, followed by continued breastfeeding with appropriate complementary feeding to two years and beyond, is the recommended norm (WHO; SA NDoH). Breastfeeding reduces infant infectious morbidity and mortality (particularly diarrhoeal and respiratory disease), reduces sudden unexpected death, and confers maternal benefits. Yet South Africa has historically had low EBF rates, driven by a legacy of formula promotion, the HIV epidemic, and the practical realities of women returning to work and of mixed feeding. Your job is to be neither a dogmatist nor a defeatist: you support breastfeeding as the default, you make it work where you can, and you handle the genuine exceptions safely. This chapter assumes you have already framed the pregnancy through antenatal-booking and pregnancy-nutrition, and connects forward to normal-puerperium, postpartum-contraception and hiv-in-pregnancy.
Core knowledge
The four feeding options
There are, practically, four options to be able to describe and contrast:
| Option | What it is | Primary role |
|---|---|---|
| Exclusive breastfeeding (EBF) | Only breast milk (plus prescribed medicines/ORS), no water, other fluids or solids, for 6 months | The recommended default for almost all SA mother–infant pairs |
| Mixed feeding | Breast milk plus other milks/fluids/solids before 6 months | The riskiest pattern, especially with HIV — avoid |
| Exclusive formula (replacement) feeding | Commercial infant formula, no breast milk | For genuine contraindications, or informed maternal choice that meets safety criteria |
| Expressed breast milk / donor milk | Mother's own expressed milk or pasteurised donor human milk (PDHM) | Preterm/sick infants, separation, low supply support |
Physiology of lactation
Figure I19.1 — Lactation physiology: the prolactin synthesis pathway, oxytocin let-down, demand-led supply control and the top-up trap.
Milk production is governed by two hormones acting on a primed breast. Prolactin, released from the anterior pituitary in response to suckling, drives milk synthesis by the alveolar lactocytes. Oxytocin, from the posterior pituitary, causes myoepithelial contraction and milk ejection (the "let-down" reflex) and is conditionable, so stress and pain inhibit it. After delivery of the placenta, the fall in progesterone removes the brake on prolactin and triggers lactogenesis II (copious milk "coming in") at roughly day 2–4. Thereafter supply is governed by autocrine, demand-led control: frequent effective milk removal up-regulates production; retained milk (via the inhibitory peptide FIL — feedback inhibitor of lactation) down-regulates it. This is why early, frequent, unrestricted feeding with good attachment is the single most important determinant of supply, and why "topping up" with formula is self-defeating — it reduces stimulation and supply.
Colostrum, produced in the first few days, is low in volume but rich in immunoglobulin (secretory IgA), lactoferrin, leucocytes and growth factors — immunologically and developmentally ideal, and matched to the neonate's tiny gastric capacity. Mature milk is dynamic: foremilk is more watery and thirst-quenching; hindmilk is fattier and calorie-dense, which is why one breast should be finished before offering the second.
Why breast milk is biologically superior
- Anti-infective: secretory IgA, lactoferrin, lysozyme, oligosaccharides (prebiotic), live leucocytes and the maternal microbiome — directly lowering gastroenteritis, respiratory and middle-ear infection. This matters enormously where water and sanitation are unsafe.
- Nutritionally complete and adaptive to the term infant for the first 6 months (the one caveat being vitamin D and, in some settings, vitamin K at birth — standard teaching, hedge specifics).
- Gut and immune programming: promotes a healthy microbiome and gut closure.
- Maternal benefits: faster involution and reduced immediate postpartum bleeding (oxytocin), lactational amenorrhoea, and reduced longer-term risk of breast and ovarian cancer and type 2 diabetes (standard teaching).
- Practical and economic: free, sterile, always the right temperature, no preparation errors — decisive advantages in low-resource and emergency settings.
Infant formula — what it is and is not
Commercial infant formula is a manufactured cow's-milk- (or soy-) based substitute designed to approximate the macronutrient profile of breast milk. It is a legitimate, life-sustaining food where breastfeeding is contraindicated or not chosen, but it is not equivalent: it lacks the live immunological and microbiome components, demands clean water, fuel, and correct reconstitution, and carries real risk of contamination and of over- or under-dilution. The risks of formula are context-dependent — modest in a household with safe water, refrigeration and reliable supply; substantial in a household without them.
The AFASS / replacement-feeding criteria
When replacement feeding is considered (classically in the HIV context), it is judged against whether it is Acceptable, Feasible, Affordable, Sustainable and Safe (AFASS) — i.e. the home has safe water and sanitation, the mother can reliably provide enough formula to support normal growth, prepare it cleanly, and sustain it for as long as needed without stigma. In much of South Africa these conditions are not reliably met, which is the core reason national policy moved decisively back toward breastfeeding (see Management).
Assessment
Counselling on infant feeding is itself a clinical skill assessed across the antenatal and immediate postnatal period. Begin antenatally — feeding intention is part of the booking and birth-plan conversation, not a postnatal afterthought.
History
- Maternal intention and prior experience: has she breastfed before, and how did it go? Previous mastitis, low-supply concerns, breast surgery (reduction, augmentation), inverted nipples.
- Social and home context: safe water and sanitation; electricity/fuel; refrigeration; cost capacity; return-to-work timeline and ability to express; household support and the role of grandmothers (a major influence on mixed feeding); intimate-partner dynamics and food security. This is where AFASS lives in practice.
- HIV status and ART (see hiv-in-pregnancy and hiv-counselling): documented status, regimen, adherence, most recent viral load. This single factor reshapes the counselling.
- Maternal medications and substance use: review against feeding (see substance-use-in-pregnancy). Most drugs are compatible; check each.
- Maternal conditions: active untreated TB, severe illness, prior galactosaemia in a child.
Examination
- Breasts: nipple shape (flat/inverted), scars from surgery, signs of mastitis or abscess.
- The infant: tone, alertness, congenital anomalies affecting feeding — cleft lip/palate, micrognathia, ankyloglossia (tongue-tie), neurological problems, prematurity. Assess latch and a breastfeed directly — the most informative examination of all.
- Weight and hydration: plot on the Road-to-Health booklet. Expect up to ~7–10% weight loss in the first days with recovery by ~day 10–14 (standard teaching), and adequate wet/dirty nappies.
Investigations
Feeding is largely a clinical assessment; investigations are targeted:
- Maternal HIV viral load to guide the HIV-feeding conversation.
- Infant weight trajectory as the single best measure of feeding adequacy.
- Bilirubin where jaundice raises concern about intake (breastfeeding/breast-milk jaundice are diagnoses of relative exclusion).
- Galactosaemia / inborn-error screening only if clinically suspected.
Management
The default: protect, promote and support breastfeeding
For the great majority of South African mother–infant pairs the management is to establish and sustain exclusive breastfeeding. The evidence-based levers are the Baby-Friendly Hospital Initiative (BFHI) "Ten Steps to Successful Breastfeeding" (WHO/UNICEF), which SA has adopted through the Mother-Baby-Friendly Initiative (MBFI):
- Skin-to-skin contact immediately after birth and initiation of breastfeeding within the first hour ("the golden hour") — promotes attachment, colostrum intake, thermoregulation and bonding. This dovetails with delayed cord clamping in neonatal-transition.
- Rooming-in 24 hours a day; feeding on demand (cue-based, not by the clock), typically 8–12 times per 24 h in the early weeks.
- Correct positioning and attachment: baby's mouth wide, more areola visible above than below the lip, chin to breast, no nipple-only "lipstick" latch — this prevents the cracked nipples and poor transfer that derail breastfeeding.
- No artificial teats, dummies or unnecessary supplements unless medically indicated.
- Skilled support from a lactation-aware midwife/clinician, and linkage to community and peer support after discharge.
Address the common, fixable problems head-on so they don't end the breastfeeding journey: sore/cracked nipples (almost always an attachment problem — fix the latch), engorgement (frequent feeding, expression, analgesia), blocked ducts and mastitis (continue feeding/expressing from the affected side, analgesia, antibiotics if features of infection/systemic illness — untreated mastitis can progress to breast abscess requiring drainage), and perceived low supply (usually reassurance + more frequent effective feeding; true low supply is uncommon).
HIV and infant feeding — the South African position
Figure I19.2 — South African infant-feeding pathway, emphasizing exclusive breastfeeding as the default, HIV viral suppression, AFASS replacement criteria, mixed-feeding risk and 2026 PVT prophylaxis.
This is the highest-yield area and a common source of error. The historical pendulum swung from promoting formula (avoid-all-breastmilk era) to the current, firmly pro-breastfeeding position, because the population-level harm of replacement feeding (diarrhoeal disease, malnutrition, lost protection) outweighed the residual transmission risk once mothers are on effective ART.
Current SA NDoH guidance (Maternity Guideline (NDoH, 2024), aligned with WHO):
- A woman living with HIV who is on ART with viral suppression should be counselled and supported to breastfeed exclusively for 6 months, then continue breastfeeding with complementary feeding to 12 months and beyond while ART continues — because maternal ART with viral suppression makes transmission via breast milk very low, and EBF is far safer than mixed feeding.
- Lifelong ART (TLD: tenofovir + lamivudine + dolutegravir) with sustained viral suppression and good adherence is the foundation — the feeding advice presupposes it (see hiv-in-pregnancy).
- Mixed feeding before 6 months is the highest-risk pattern in HIV (it is thought to inflame/disrupt the infant gut and is associated with greater transmission than either EBF or exclusive formula) — counsel firmly against it whichever milk is chosen.
- Replacement (formula) feeding is reserved for women who genuinely meet AFASS-type criteria, or who, fully informed, choose it. Where free formula is provided it must come with support to do it exclusively and safely.
- Infant prophylaxis (2026 PVT model): under the National Consolidated Guidelines (2026), every HIV-exposed infant starts dual prophylaxis — nevirapine (NVP) once daily + zidovudine (AZT) twice daily — from birth until the delivery/maternal viral load is known; higher-risk infants (maternal VL ≥ 50 c/mL or unsuppressed) get AZT 6 weeks + NVP 6 weeks, with NVP extended and stopped at 12 weeks only if the maternal VL is then < 50. HIV-exposed infants are no longer given cotrimoxazole (only HIV-infected infants are). The HIV PCR schedule runs at birth, 10 weeks, through breastfeeding, and 6 weeks after breastfeeding stops (see hiv-in-pregnancy).
When formula is genuinely indicated
- Infant galactosaemia — an absolute contraindication to breast milk (the infant cannot metabolise galactose); requires a special lactose-free formula.
- Maternal contraindications (standard teaching — verify specifics): certain maternal medications incompatible with breastfeeding (e.g. active cytotoxic chemotherapy, some radioisotopes), and maternal substances of concern.
- HIV only where AFASS-type criteria are met or after informed maternal choice, never as a blanket rule.
- A mother who, after balanced counselling, chooses formula has the right to do so and must be taught safe preparation: clean hands and equipment, safe water (boiled and cooled appropriately), correct scoop-to-water ratio (never over- or under-dilute), fresh feeds (discard leftovers), and safe storage.
Special situations
- Preterm and sick neonates: mother's own expressed milk is strongly protective (notably against necrotising enterocolitis — standard teaching); where unavailable, pasteurised donor human milk from a milk bank is preferred over formula for the smallest infants. Support early and frequent expression to establish supply during separation.
- Cleft lip/palate, tongue-tie, hypotonia: feeding support, specialised teats/positions, expression; MDT input.
- Maternal–infant separation / return to work: teach expression and safe storage so EBF can continue; this is central to making the 6-month target achievable.
- Lactational amenorrhoea and contraception: full, on-demand, day-and-night breastfeeding with amenorrhoea in the first 6 months gives meaningful (but not absolute) protection — counsel that this is not a reliable stand-alone method and link to postpartum-contraception (progestogen-only methods are breastfeeding-compatible).
The regulatory and ethical backdrop
South Africa enforces the WHO International Code of Marketing of Breast-milk Substitutes through Regulation R991 (2012) — restricting promotion, free samples and health-facility marketing of formula, bottles and teats. As a clinician you must not be an inadvertent marketing channel: counsel on merit, not on what a representative left in the clinic. This is also an informed-consent and beneficence matter under respectful-care — the woman's autonomous, supported choice is the goal.
Red flags / pitfalls
Figure I19.3 — Red-flag drill for the newborn who is not feeding well, from recognition to immediate assessment, treatment and escalation.
Feeding failure is a neonatal emergency in slow motion — escalate before collapse. The infant who is feeding poorly can dehydrate, become hypoglycaemic and hypernatraemic, and decompensate suddenly.
Recognise and act on:
- The "not feeding well" newborn — lethargy, poor suck, ≤ a few wet nappies/24 h, excessive weight loss (>10%) or failure to regain birth weight by ~2 weeks, a sunken fontanelle, or jaundice with poor intake. Drill: assess hydration and glucose immediately, check a feed and latch, weigh, and treat hypoglycaemia/dehydration; if the baby is lethargic, not feeding, or has any danger sign, this is sepsis until proven otherwise — escalate to neonatal care, do not "wait and see".
- Hypernatraemic dehydration from inadequate breast-milk intake — can cause seizures and cerebral injury; suspect it in the lethargic, dehydrated, breastfed infant with marked weight loss.
- Maternal breast abscess — a fluctuant, tender mass with systemic features needs drainage, not just oral antibiotics; continue feeding/expressing.
Counselling and management pitfalls:
- Promoting mixed feeding "to be safe" — exactly wrong, especially in HIV; mixed feeding before 6 months is the highest-risk pattern.
- Reflexively prescribing formula for an HIV-positive mother — outdated; the supported, virally-suppressed default is breastfeeding.
- Solving early feeding wobbles with a top-up bottle — undermines supply and attachment; fix the latch and increase effective feeding instead.
- Working from the old infant-prophylaxis model — the 2026 guideline gives all exposed infants dual NVP + AZT until the delivery VL is known, dropped the higher-risk threshold to maternal VL ≥ 50, and stopped cotrimoxazole for HIV-exposed infants; the pre-2026 single-NVP/risk-tier scheme is outdated.
- Treating "not enough milk" as fact — true insufficiency is uncommon; assess transfer, weight and nappies before accepting it.
- Failing to assess feeding context antenatally — AFASS, return-to-work and household influence are best addressed before birth, not at a postnatal crisis.
- Ignoring maternal mental health — feeding difficulty and postnatal depression feed each other; screen and support (see gbv-mental-health-pregnancy).
- Acting as a formula marketing channel — a breach of R991 and of ethical counselling.
Evidence anchors
- South African National Integrated Maternal and Perinatal Care Guideline (2024), NDoH — the SA source of truth for infant-feeding counselling; exclusive breastfeeding to 6 months then continued breastfeeding with complementary feeding; breastfeeding the default for virally-suppressed women on ART.
- National Consolidated Guidelines for the Prevention and Management of HIV… in Pregnant & Breastfeeding Women (NDoH, published January 2026) — supersedes the 2023 ART + 2019 PMTCT guidelines; lifelong ART (TLD) and viral suppression as the foundation of safe breastfeeding; universal infant dual prophylaxis (NVP + AZT) until the delivery VL is known, higher-risk threshold maternal VL ≥ 50, and no cotrimoxazole for HIV-exposed infants.
- WHO recommendations on infant feeding and HIV and WHO/UNICEF Baby-Friendly Hospital Initiative — "Ten Steps to Successful Breastfeeding" — global basis for exclusive breastfeeding, early initiation, rooming-in and demand feeding (operationalised in SA as the Mother-Baby-Friendly Initiative).
- WHO International Code of Marketing of Breast-milk Substitutes, enacted in SA as Regulation R991 (2012) — restricts marketing of breast-milk substitutes, bottles and teats.
- South African Maternal, Perinatal and Neonatal Health (MPNH) Policy 2021 and Saving Mothers / NCCEMD reporting — situate feeding within SA maternal–neonatal outcomes and the burden of HIV and infectious disease.
- ILCOR 2025 / ERC 2025 Newborn Life Support / AAP NRP (8th ed) — early skin-to-skin and the "golden hour" framing of immediate newborn care that underpins early initiation of breastfeeding (see neonatal-transition).
- South African EML — special/therapeutic formulas (e.g. lactose-free formula for galactosaemia) and provision of infant formula within the PVT programme follow EML and programmatic availability.
Note on hedged facts: weight-loss thresholds (~7–10% physiological, >10% as a flag), feed frequency (8–12/24 h), AFASS criteria framing, the protective effect of mother's milk against NEC, and maternal long-term cancer/diabetes risk reduction are stated as standard teaching, not line-itemed verified values. Infant prophylaxis and PCR-timing specifics are taken from the 2026 National Consolidated Guidelines (see hiv-in-pregnancy); confirm doses on the current chart before prescribing.