How much weight should a baby gain each month in the first 3 months?

Patient's question:

Sure, here is the translation of the content you provided:
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No
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Doctor's answer:

Hello, in this case, the rate of weight gain in infants is not uniform. Infant weight; 1-6 months weight (kilograms) = birth weight (kilograms) + age in months x 0.6 kilograms