The following is a Baby Boy Growth Chart from day one to 36 months or three years.
Keep in mind, the chart is made in the west by Western doctor. It should suit those who are born from Western parents as far as height is concerned.
So, I don't think you should be worried if your son's height is not as tall as projected in the chart as genetics play a very pivotal role in a person height.
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About Me:
I am a 263 days / 8 months, 3 weeks & 2 days old baby