Why is my newborn's stool green?

The color of a newborn's stool may be caused by the following factors: 1. Bile secretion: Green stool may result from biliverdin in bile not being fully broken down, typically occurring during the first few days of life. This condition is considered normal and usually improves as the digestive system matures. 2. Breast milk or formula components: Certain components in breast milk or formula may affect stool color. In some cases, green stool may be related to lactose, iron, or other nutrients ingested by the infant. 3. Digestive issues or infection: If green stool is accompanied by diarrhea, vomiting, or other discomfort, it may indicate indigestion, viral infection, or other gastrointestinal problems. Close monitoring of the infant's health is necessary in such cases. If a newborn's stool remains green and is accompanied by other abnormal symptoms, prompt medical attention should be sought.