Once your baby is past the first week, their diet plays the biggest role in their bathroom habits. Human breast milk and baby formula are digested quite differently by a newborn's tiny tummy.
Breastfed Babies
Breast milk is considered the perfect food for babies because it is highly digestible. Because it passes through the digestive system so easily, breastfed babies tend to poop quite often in the early weeks.
When anxious parents ask about a breastfed new born baby how many times motion per day is considered healthy, the answer is usually: a lot! During the first 4 to 6 weeks, it is completely normal for a breastfed infant to have a bowel movement after nearly every single feeding. This can mean anywhere from 4 to 10 dirty diapers a day. The poop is usually mustard-yellow, loose, and slightly seedy in texture.
However, do not be alarmed if this changes. Around 4 to 6 weeks of age, a breastfed baby’s digestive system matures. Because breast milk leaves very little solid waste, your baby might suddenly go from pooping six times a day to pooping once every three, five, or even seven days! As long as the baby is gaining weight, has plenty of wet diapers, and the stool is soft when it finally passes, this sudden drop in frequency is perfectly normal.
Formula-Fed Babies
Formula takes a little longer for a baby's body to digest. Therefore, formula-fed babies typically have fewer bowel movements than breastfed babies right from the start.
Generally, a formula-fed baby will have 1 to 4 bowel movements a day. Some perfectly healthy formula-fed babies may only go once every day or once every other day. The stool is usually firmer than a breastfed baby's (resembling the texture of peanut butter) and ranges in colour from tan to yellow or greenish-brown.