Newborn Poo: What's Normal (and What's Not)

Nothing prepares you for how much you'll discuss poo in the first month. Here's a Maternal Health Nurse–approved guide to what's normal at every stage, what's not, and the three colours that always warrant a GP call. Most newborn poo questions are answered in the first nappy aisle conversation. Days 1–4: meconium Sticky, black-green and tar-like. This is meconium — the gut lining baby has been carrying since pregnancy. Expect 1–4 per day until it clears around day 4. Days 4–14: transitional Greenish-brown loosening to yellow as milk feeding gets established. Frequency increases. Breastfed babies often do one with every feed; formula-fed babies tend to be less frequent but firmer. A folded muslin and clean nappy — your most-used tools for the next year. Two weeks to 6 months Breastfed: mustard yellow, seedy, sometimes runny — anything from 5 a day to one every 7–10 days is normal as long as baby is comfortable and gaining weight. Formula-fed: firmer, tan to pale brown, less frequent — 1–3 per day typical. After solids Colour and smell change overnight once you start solids. Pieces of food corn, blueberries, leafy greens often appear undigested — completely normal. Three colours to phone your GP White, pale or chalky — possible liver issue. Red or bloody — could be a small tear, but always worth checking. Black after the first week — possible upper-gut bleeding. Diarrhoea frequent, watery, foul-smelling plus fever or feeding less is a same-day GP call, especially for babies under 3 months. Keep reading How much milk does a baby need? Constipation in babies: gentle relief Formula stages explained All free parenting tools Personalised care plans by a Maternal Health Nurse Frequently asked questions Is bright green poo normal? Often yes — usually a foremilk/hindmilk imbalance or a recent feed change. Persistent green plus unsettled feeding warrants a chat with your MCH nurse. How long can a breastfed baby go without pooing? Up to 7–10 days after 6 weeks of age can be normal if baby is comfortable, feeding well, and gaining weight. Why does my baby strain so much? Newborns push with their whole body. Straining without a hard, dry stool is not constipation. What if my baby's poo smells terrible? Once solids start, smell ramps up. Sudden, severe foul smell with diarrhoea needs a GP review. Are mucus stools normal? Small amounts occasionally — yes. Persistent, large…