In your own words, what is the definition of "Developmental Milestones?"

Child development stages are the theoretical milestones of child development, some of which are asserted in nativist theories.

Explanation:

Developmental milestones are things most children can do by a certain age. Skills such as taking a first step, smiling for the first time, and waving “bye-bye” are called developmental milestones.

when you rub, you also apply pressure, that pressure can urge the poop to come out. i think that when your rubbing, you also might be slightly breaking it up and that can further fill the stomach.  

what are the choices?