Constipation is a common issue that many children experience as they grow. It’s defined as infrequent bowel movements or a difficult passage of stool which may include pain. Starting from birth, the bowel movements of babies are quite different than those of a healthy adult. Within 48 hours of birth, babies will pass meconium -- substances ingested during the time spent in the uterus. Around the first week of birth, babies will normally have a soft bowel movement after each feeding.