Newborns out of the month did not gain weight this situation is not normal, need to promptly seek medical attention. Physiological weight loss after the birth of the baby, generally speaking, can drop 5%-10%. About a week to return to birth weight, and then every day can grow 15-30g, every week can grow 200-250g, a month when the baby’s weight can grow 600-800g, some babies can grow to 1000g. The child in the month in addition to weight growth, length is also to grow, can grow 1-1.5cm per week, to the birth of the full moon when the child can grow to about 50-60cm. Newborns out of the month weight did not grow, in addition to consider the lack of feeding, but also to consider whether the newborn disease, it is recommended to go to the hospital in a timely manner to check, and then according to the cause of the symptomatic treatment.