Is it normal for a 4-month-old baby to only grow 5 cm?

Patient's question:

The baby grew only 5 cm from 4 months to 8 months, but after a thorough check, it was found to have a serious zinc deficiency in trace elements. The bone age was normal. Later, zinc supplements were given after 8 months. From 8 months to 12 months, the baby grew centimeters. Did zinc start to take effect? The doctor prescribed Lysine Zinc Granules. Is the growth rate normal afterward?

Doctor's answer:

The baby grew only 5 centimeters from four to eight months, but after a thorough check, it was found to have severe zinc deficiency, although the bone age was normal. Zinc deficiency interferes with appetite, making it easy to lead to malnutrition, which indirectly affects growth. After zinc supplementation, the increase in height is not mentioned, so it is also unknown whether the growth rate is normal. After zinc supplementation, if the height exceeds 75 centimeters at one year and 10 months, it is basically considered normal.

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