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

There’s a lot of developmental milestones that happen between age 1 and 2. Calling them 1 the whole time doesn’t really convey the actual abilities and expectations of the child through that age range