How to Determine Normal Growth and Development in Babies?

A 5-month-old female baby, breastfed, started solid foods at 4 months. However, she has been experiencing slow growth recently, with unsatisfactory increases in height and weight. Accompanied by sleep issues and excessive sweating, she was diagnosed with calcium deficiency and prescribed cod liver oil, but there has been no significant improvement. The question is whether such development is normal, and if not, how should it be handled.
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