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Your baby’s first stool will be made up of something called meconium. This is sticky and greenish/black.

After a few days the stool will change to a yellow or mustard colour. Breastfed babies’ stool is runny and doesn’t smell. Formula fed babies’ stool is firmer, darker brown and more smelly.

Some infant formulas can also make your baby's stool dark green. If you change from breast to formula feeding, you’ll find that your baby's stool become darker and more paste-like.

Pale stool may be a sign of jaundice. If you're worried, speak to your midwife or health visitor. 

How often should my baby do a poo?

In the first 4 weeks your baby should pass stools every day that are at least the size of a £2 coin.  At the beginning your baby will pass a black tar-like stool call meconium.  After 4 days breastfed babies should pass at least 2 yellow stools in 24 hours that are normally loose and formula- fed babies will pass a firmer, more bulky stool at least one stool every day.  Bottle fed babies are more prone to constipation.  If your baby is showing signs of pain or straining when stooling or if during the first 4 weeks is not passing stools every day seek further advice from your midwife, health visitor or GP.

Is it normal for my baby’s stool to change?

From day to day or week to week your baby’s stool will probably vary. If you notice a marked change of any kind, such as the stool becoming very smelly, very watery or harder, particularly if there’s blood in them, you should talk to your doctor or health visitor.

Pale stool may be a sign of jaundice. If you're worried, speak to your midwife or health visitor.

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