Diapers & daily care

Newborn poop

The first poop is usually sticky black or dark green meconium. Over the next few days, it should become lighter and softer as feeding picks up. Red or white poop—or black poop after meconium has cleared—needs prompt medical advice.

Full guide

The dated summary changes with the card you choose. The complete reference below stays available for context and safety.

What to expect right now

Meconium is the material that filled the bowel before birth. It can look black-green, thick, shiny, and tar-like, and it may take several wipes to remove. Those first dark diapers are expected.

Most newborns pass meconium during the first day or two. If there has been no first poop by 48 hours after birth, the American Academy of Pediatrics (AAP) says the baby needs further evaluation; contact the care team promptly. See the AAP’s guide to common newborn conditions.

How poop changes next

First day or two: expect black or very dark green, sticky meconium.
Over the next few days: poop usually loosens and shifts from black through brown and green toward yellow as milk stools replace meconium.
By about day 4 or 5: a baby receiving breast milk usually has loose yellow poop that may look seedy. Formula-fed poop is commonly tan or yellow and firmer, but no harder than soft clay. Green can be normal with either feeding method. Mixed-fed poop may fall anywhere between these descriptions. The AAP’s newborn diaper guide describes these differences.
From about 3–6 weeks onward: timing remains variable. Some breastfed babies poop less often, while others still poop after many feeds. Soft poop, steady feeding, and growth matter more than a perfectly even schedule.

Reassuring signs

The dark meconium is giving way to lighter, softer poop during the first week.
Poop is soft rather than dry, firm, or pellet-like.
Baby feeds actively, can be roused to feed, and has a rising number of wet diapers.
Baby’s belly is soft between feeds, with no repeated vomiting.
The overall poop pattern is stable or changing gradually, not suddenly much more watery and frequent.

When to call or get help

Call the pediatrician

Poop is hard, dry, formed, or pellet-like, especially if baby seems uncomfortable.
A formula-fed baby poops less than once a day and seems to strain.
You are unsure whether a change fits baby’s feeding method or individual discharge plan.

Get prompt medical advice

No meconium has passed within the first 48 hours.
Poop is red or bloody; white, chalky, or very pale gray; or black and tarry after the first meconium diapers. The AAP’s baby poop color guide says every bloody stool should be evaluated and pale stool should be assessed as soon as possible.
Poop is not becoming lighter by about day 4 or 5, especially if feeding or wet diapers are not increasing.
There is a sudden jump in watery stools, a large amount of mucus, or more than one very watery stool per feeding.

Get urgent help now

Get urgent medical care for a concerning stool with a swollen, hard belly; repeated vomiting; poor feeding; unusual sleepiness or weakness; or a baby who looks very sick. Call the pediatrician immediately for a rectal temperature of 100.4°F (38°C) or higher in a baby 3 months or younger. Call emergency services if baby cannot be woken or is struggling to breathe. See the AAP’s guide to common newborn warning signs. The AAP’s newborn bowel-movement guidance explains when diarrhea, blood, and illness signs need immediate attention. A webpage cannot assess an unwell newborn.

Usually not a worry

Green poop: yellow, tan, brown, and green are all common after meconium has cleared.
Loose or seedy poop: breast-milk poop can look runny or curdled without being diarrhea. A sudden increase in wateriness and frequency is the more useful warning sign.
Some pushing: a young baby may grunt, cry, or turn red before passing soft poop while learning to coordinate the muscles used for a bowel movement.
Uneven timing: some babies poop after many feeds, while others go longer between soft stools. Frequency can change with age and feeding method.

Soft poop, comfortable feeding, normal wet diapers, and a baby who settles afterward are reassuring. Health Canada’s infant bowel-function guidance notes that frequency varies widely and straining with a soft stool is not, by itself, constipation. Blood or an unwell baby changes the advice.

Useful today

Track feeds, wet diapers, and poops across 24 hours; note the poop’s color and whether it is sticky, soft, or watery.
For an unusual diaper, check it in good light and take a photo to show the care team before discarding it.
Change a poop diaper promptly, clean gently, and pat the skin dry.
If formula-fed poop is hard or dry, check that formula is mixed exactly as directed. Add the measured water first, then powder; do not add extra water.
Do not add extra water or try a constipation remedy unless a clinician specifically advises it.