why do we refer to infants above a year in months?

Question

For example we refer to infants over a year as 13 months, 16 months, 24 months, etc. Is there a reason for this convention?

In: Biology

Answer 1

Development under 2 years goes fast

You need that fidelity to show what point of development the child is at. Child goes from not being able to move, to flipping themselves, to crawling, to walking.

A 2 month old vs an 8th month old is like the difference between a 20 year old and a 30 year old in development. This rapid development continues until around 2.