For a 40-day-old baby, each feeding is about 80,100 ml, and the baby is nursed once every 23 hours. 40-day-old babies are nursed according to the principle of “on-demand feeding”, as long as the baby needs it, it should be given breastfeeding. Babies have weak gastrointestinal digestion and absorption ability, usually breastfeeding or formula feeding is the main. Observe your baby’s bowel movements. Normal about 13 times a day, if a long time without stool, to oral probiotics to regulate the beneficial intestinal flora. Breastfeeding mothers should eat more vegetables and fruits, give the baby to do clockwise abdominal massage, 2 times a day, 1 time about 10 minutes, can relieve the baby does not relieve the stool of this situation.