Children's Stool Chart: From Newborn to Toilet Training
Paediatric bowel health guide - Updated September 2026
What Is Normal for Newborns?
Newborn stool changes dramatically in the first days and weeks of life. Understanding what is normal at each stage prevents unnecessary concern and helps parents recognise genuine red flags.
The first stool is meconium - a thick, sticky, tar-like substance made up of materials ingested in the womb (amniotic fluid, mucus, lanugo). All babies produce meconium; failure to pass it within 48 hours of birth should be reported to your midwife as it may indicate Hirschsprung's disease or bowel obstruction.
As milk feeds establish, stool transitions from meconium to early milk stool. This greenish-brown transition stool is entirely normal and typically appears as feeds increase.
Breastfed babies typically produce frequent, soft, mustard-yellow stools with a seedy or grainy texture. They may pass stool several times per day or once every several days - both are normal for exclusively breastfed babies, as breast milk is very efficiently absorbed with little waste.
Formula-fed babies produce firmer, more consistently coloured stools. They typically pass stool 1-4 times per day. The smell is more pronounced than breastfed stool. Green stools in formula-fed babies may indicate the formula is passing through too quickly.
Weaning (6-12 Months): What to Expect
When solid foods are introduced (NHS recommends around 6 months), stool form changes significantly. As dietary fibre from fruit, vegetables, and cereals increases, stools become firmer, darker, and more formed. You may notice undigested food pieces in the nappy - this is entirely normal, particularly for foods like sweetcorn, blueberry skin, and legumes.
The Bristol Stool Chart becomes applicable from weaning onwards, though paediatric reference values differ slightly from adults. Types 3-4 are the target for toddlers once established on a mixed diet. Temporary soft stools (type 5-6) are common when introducing new foods and are not a concern unless persistent.
Toddler and Child Constipation
Constipation is one of the most common paediatric conditions, affecting up to 30% of children at some point. In toddlers and children, it frequently presents as:
- Passing fewer than three stools per week
- Bristol types 1-2: hard, pebble-like, or very firm stools
- Straining or crying during defecation
- Soiling (overflow incontinence when hard stool is impacted)
- Poor appetite, abdominal distension, or stomach aches
- Withholding behaviour - crossing legs, going on tiptoe, refusing to go to the toilet
Paediatric Constipation Management (NICE)
NICE guideline CG99 recommends macrogol (polyethylene glycol 3350 plus electrolytes, sold as Movicol Paediatric or Laxido Paediatric) as first-line treatment for childhood constipation, for both disimpaction and maintenance. This is an osmotic laxative that softens stool by drawing water into the bowel. CG99 sets no minimum age for it, though NICE notes that not all these preparations are licensed in children under 12 and that licensed starting ages differ, so check the product information with your prescriber. Where macrogol is not tolerated, CG99 puts a stimulant laxative in its place, on its own or alongside an osmotic laxative such as lactulose. Lactulose is the substitute for intolerance, not the route for younger children.
Dietary measures alongside laxative treatment include increasing fluid intake, adding soluble fibre (fruit, vegetables, oats), and reducing constipating foods (excessive dairy, bananas, white rice) where relevant. Toileting routine - sitting on the toilet for 5-10 minutes after each meal, using a footstool to raise the knees - supports the natural defecation reflex.
Using the Bristol Chart During Toilet Training
The Bristol Stool Chart is a useful visual tool during toilet training. Showing a child (age 2-3+) a simplified version of the chart and explaining that the goal is a "smooth sausage" (type 4) can help children understand what healthy stool looks like and reduce anxiety around the process. Avoid using negative language about types 1-2 or 6-7 - instead, frame it as the body working to find its happy balance.
NHS England publishes a plain-language Bristol chart as part of its constipation campaign. It is addressed to carers rather than parents specifically, and its instruction is broader than a single target: "If a poo does not look like type 3 or type 4 it could be constipation." Type 3 counts as well as type 4, which is worth knowing before you worry about a child who is consistently passing cracked but comfortable stools. Consistently hard stools during toilet training are a signal to increase water and fruit intake before resorting to laxatives.
When to See a GP or Seek Emergency Care
See a GP:
- -Blood in stool in any infant or child
- -Constipation lasting more than 2 weeks without improvement
- -Failure to pass meconium within 48h of birth
- -Child under 1 year with significant constipation
- -Persistent diarrhoea (more than 10 days)
- -Associated poor growth or weight loss
Seek urgent/emergency care:
- !Signs of dehydration in infant: no wet nappy for 12h, sunken fontanelle, very dry mouth
- !Bloody diarrhoea with fever
- !Abdominal distension with bile-stained vomiting
- !Child appears very unwell, lethargic, or in severe pain
Updated September 2026. Sources: NICE CG99 (constipation in children). NHS Start4Life. NHS guidance on infant feeding and stool colour.