Not an easy question to answer. Your baby's constipation started at 4 months with introduction of solids, so it is probably the cereal which is causing this. Change from the Cerelac cereal which contains cows milk and rather use Purity rice cereal.It is possible that the NAN2 is aggravating his constipation so rather change to either NAN Pelargon or to Lactogen2. Do not give the extra calcium as this may also be aggravating his constipation. Breast milk is best especially with a constipated baby.He is definitely not taking enough milk per day as his requirements are 140ml for every kilogram he weighs per day.
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