In light of certain recent government regulations redefining "child" to mean anyone under the age of 18, I would like to propose that we should adjust other terms for people of specific ages to match

In light of certain recent government regulations redefining "child" to mean anyone under the age of 18, I would like to propose that we should adjust other terms for people of specific ages to match this new and increasingly popular language regime:

Child: Ages 13-17 Toddler: Ages 9-12 Infant: Ages 5-8 Newborn: Age 2-4 Foetus: Under 2 years old