Understanding Your Newborn’s Stool Patterns: A Quick Guide When your newborn arrives, expect their first bowel movement to be meconium—a dark green and tarry stool—within the first 24 hours of birth. 🍼 By the 3rd day, you might notice an increase in stool frequency, with the stools becoming semi-loose and greenish-yellow. These will typically normalize within the next 1-2 days. So don't panic. By the 5th to 7th day, breastfed babies often produce frequent golden-yellow, semi-loose, and sticky s