More than a week old baby three times a day stool, may be physiological factors lead to, at this time is normal; may also be indigestion, acute enteritis and other pathological factors lead to, at this time is not normal. 1. physiological factors: if the baby has been three times a day stool, good growth and development, weight gain is also very good, no other discomfort, can be considered normal; or recently the baby to eat more food with high fiber content, the number of bowel movements increased, may also be normal. 2. Pathological factors: the baby three times a day, there may be a combination of dyspepsia, acute gastroenteritis and other diseases, usually accompanied by a change in the nature of the stool, such as milk petals in the stool, dilute watery stool or mucus pus and blood, and so on. If you have a week old baby who has three bowel movements a day, there may be other reasons, it is recommended to rule out physiological factors and then consult a doctor to check the cause, and cooperate with the doctor to treat the problem if necessary.