Ideally new born babies gain about 700 grams to a kilo in the first 3 months. It may be slightly less sometimes, though a 500 gram weight gain per month does not necessarily mean its abnormal. However, a follow-up check is recommended.
After the first 3 months, babies gain anywhere between 400 to 500 gram per month for the next 3 months and in the latter part of the year, babies may gain only about 250 grams to 300 grams per month.
Overall, a baby gains about 6 kilos on his birth weight by the end of a year
Visit doctorscircle.in to talk to Dr. Jyothi