How many days does a three-month-old baby poop?

Patient's question:

Hello! My baby, who was born 20 days early, has had abnormal bowel movements since the second month. Initially, it was twice a day (soft banana-like stool), then it changed to once every three days (soft banana-like stool), and now it's once every four days, and it's not dry, a bit runny...

Doctor's answer:

The symptoms you described—your baby only having a bowel movement every few days—are typical signs of infant constipation. Your description mentions that the stool is slightly loose, green, and contains a small amount of curdled milk, which suggests mild infantile intestinal inflammation. The causes and treatments for this condition are complex.
The primary causes include insufficient dietary intake and inadequate sugar levels in the diet, both of which can lead to reduced residue after absorption and small amounts of stool. A high-protein diet can make the stool alkaline, dry, and more frequent. Additionally, foods high in calcium can also cause constipation, such as cow’s milk, which contains more calcium than breast milk, making formula-fed infants more prone to constipation. This can slow down gastrointestinal motility, poor digestion, and prolonged retention of food residue in the intestines, leading to infant constipation.
Recommendations:
Given that your baby is only 3 months old and their digestive system is still underdeveloped, oral medication is not recommended. I have a (collected) method of using massage and stimulation to induce bowel movements: shave a bar of soap into strips and insert it into the rectum. This is a simple and effective method. Inserting an oil-coated enema tip into the rectum and gently moving it can also help with defecation. Using one-third of a pediatric glycerin enema to stimulate the rectal wall can also promote bowel movements.
Wishing your baby good health.

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