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Ages & Stages

Baby's First Days: Bowel Movements & Urination

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​Many new parents wonder what's normal and what's not when it comes to diapering their newborn. Here's what you can expect during your baby's first few days.

Urination

How often should newborns wet their diaper?

Your baby may urinate (pee) as often as every one to three hours or as infrequently as four to six times a day. If they're ill or feverish, or when the weather is extremely hot, their usual output of urine may drop by half and still be normal.

Urination should never be painful. If you notice any signs of distress while your infant is urinating, notify your pediatrician. This could be a sign of infection or some other problem in the urinary tract.

Newborn urine color

In a healthy child, urine is light to dark yellow in color. (The darker the color, the more concentrated the urine; the urine will be more concentrated when your child is not drinking a lot of liquid.)

In the first week after birth, you may see a pink or brick-red stain on the diaper, often mistaken for blood. In fact, this stain is usually a sign of highly concentrated urine, which has a pinkish color. As long as the baby is wetting at least four diapers a day, there probably is no cause for concern. If the pinkish staining persists, consult your pediatrician.

Newborn girls may have a small spot of blood in the diaper, also usually in the first week after birth; this blood is caused by the birth parent's hormones affecting the baby's uterus. After that time, however, the presence of actual blood in the urine or a bloody spot on the diaper is never normal, and your pediatrician should be notified. It may be due to nothing more serious than a small diaper rash sore, but it also could be a more serious problem. If this bleeding is accompanied by other symptoms, such as abdominal pain, poor feeding, vomiting, fever or bleeding in other areas, seek medical attention immediately.

Bowel movements

What is meconium?

For the first few days after birth, your baby's first bowel movements will be a substance known as meconium. This thick black or dark green substance filled their intestines before birth, and once passed, the stools turn yellow-green.


Newborn stool colors

Baby stools (poop) vary in color and consistency due to their immature digestive system. If your baby is breastfed, their stools soon should be yellow liquid mixed with some particles that remind many parents of little seeds. Until your baby starts to eat solid foods, the consistency of their stools may range from very soft to loose and runny.

If they're formula-fed, their stools usually will be tan or yellow in color. They will be firmer than a breastfed baby's, but should be no firmer than soft clay. Green stools are not unusual, either, and they should not cause alarm.

Hard stools

If your formula-fed infant is having firm, dry or formed stools, make sure you are mixing formula per the instructions. Also be sure to add the water to the bottle first and then add the formula.

Whether your baby is breastfed or bottle-fed, hard or very dry stools may be a sign that they are not getting enough fluid or that they are losing too much fluid due to illness, fever or heat. Once solids are introduced, hard stools might suggest that they are eating too many constipating foods, such as cereal or cow's milk, before their system can handle them. (Cow's milk is not recommended for babies under 12 months.) Underripe bananas can also cause hard stools and constipation in babies and toddlers.

3 important points to keep in mind about bowel movements:

  • Occasional changes in color and consistency of the stools are normal. For example, if the digestive process slows down because of foods requiring more effort to digest (such as large amounts of cereal), the stools may become green; or if the baby is given supplemental iron, the stools may turn dark brown. If there is a minor irritation of the anus, streaks of blood may appear on the outside of the stools. However, if there are large amounts of blood, mucus, or water in the stool, call your pediatrician immediately.

  • Because an infant's stools are normally soft and a little runny, it's not always easy to tell when a young baby has mild diarrhea. The telltale signs are a sudden increase in frequency (to more than one bowel movement per feeding) and unusually high liquid content in the stool. Diarrhea may be a sign of intestinal infection, or it may be caused by a change in the baby's diet.

  • The main concern with diarrhea is the possibility of dehydration. If fever (a rectal temperature of 100.4 degrees Fahrenheit) is also present and your infant is less than three months old, call your pediatrician. If your baby is over three months and the fever lasts more than a day, check their urine output and rectal temperature; then report your findings to your doctor for consideration. Make sure your baby continues to feed frequently. As much as anything else, if they simply looks sick, let your doctor know.

How often should newborns poop?

The frequency of bowel movements varies widely among babies. Many pass a stool soon after each feeding. This is a result of the gastrocolic reflex, which causes the digestive system to become active whenever the stomach is filled with food.

By three to six weeks of age, some breastfed babies have only one bowel movement a week and still are normal. Breast milk leaves very little solid waste to be eliminated from the child's digestive system. Infrequent stools should not be considered a problem in breastfed babies as long as the stools are soft, and your infant is otherwise normal, gaining weight steadily and nursing regularly. If it's been a few days since a breastfed baby pooped, they often make up for it with a large volume of stool (be prepared with lots of wipes to clean up).

If your baby is formula-fed, they should have at least one bowel movement a day. If they have fewer than this and appear to be straining, they may be constipated. Check with your pediatrician for advice on how to handle this problem.

More information


Last Updated
11/14/2024
Source
Adapted from Caring for Your Baby and Young Child: Birth to Age Five 8th edition (Copyright © 2024 American Academy of Pediatrics)
The information contained on this Web site should not be used as a substitute for the medical care and advice of your pediatrician. There may be variations in treatment that your pediatrician may recommend based on individual facts and circumstances.
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