The colour, texture, and frequency of your baby's bowel movements change dramatically in the first weeks of life and tell you a lot about how well your baby is feeding and digesting.
Meconium: Days 1–2
Meconium is the first bowel movement — dark green-black, tarry, and almost odourless. It is made of amniotic fluid, intestinal cells, mucus, and bile accumulated in the gut during pregnancy. It should pass within 24–48 hours of birth. Meconium that does not pass by 48 hours should be assessed for bowel obstruction.
The Newborn Poop Colour Guide
| Colour | When | Meaning |
|---|---|---|
| Black/dark green (meconium) | Days 1–2 | Normal — first stools |
| Dark green or army green | Days 2–4 | Transitional — meconium clearing |
| Yellow mustard, seedy | From day 3–5 (breastfed) | Normal — fully transitioned to breast milk |
| Pale yellow or cream (formula) | From first formula feed | Normal for formula-fed babies |
| Bright green, frothy | Any time | Possible foremilk/hindmilk imbalance or infection |
| White/pale grey/clay | Any time | URGENT — possible bile duct obstruction |
| Red (bloody) | Any time | Possible GI bleed — assess urgently |
| Black (not meconium) | After day 2 | Possible upper GI bleed — assess urgently |
Normal Frequency
Breastfed babies often poop very frequently in the first weeks (after every feed is normal) then may go up to 7–10 days without a poo in months 2–3 — if the stool is soft when it comes and the baby is comfortable, this is normal. Formula-fed babies typically poop 1–4 times a day.
Seek urgent care
White, clay-coloured, or chalk-coloured stools at any age suggest the bile ducts may not be working. This is a medical emergency if in a newborn — biliary atresia must be ruled out.
What Normal Consistency Looks Like
Breastfed baby poo is watery to mustard-like with small seed-like particles. Formula poo is pastier and paler. Solid food poo (when solids start) is firmer and more adult-like. Hard pellet-like stools at any age suggest constipation.