The baby five months eating milk powder 7 days pull a stool is not normal, can be seen in functional constipation, congenital megacolon, specific need to analyze and judge according to the baby’s situation. 1. Functional constipation: for 5 months of age formula milk-fed baby usually dry and thick stools, 1 to 2 times a day, or every other day to solve a stool, for the above phenomenon appeared to be obvious prolongation of the time between defecation, that it is not normal, there may be a functional constipation, some of the babies may be dry stools affecting defecation, abdominal discomfort and other conditions. 2. congenital megacolon: such babies mostly have a history of delayed discharge of fetal stools, plain stubborn constipation, the above phenomenon, through the use of corkscrew, laxatives (such as polyethylene glycol powder) or anal dilatation and other ways to maintain the discharge of stools, the severe cases can be intestinal obstruction, malnutrition, or secondary infections, etc., belong to the abnormal, and need to be actively seeking medical intervention. If your baby is on formula for 5 months and has a bowel movement once every 7 days, it is advisable to consult a specialist for evaluation and intervention.