...and how long does he/she nap for?
DS (17 weeks) seems incapable of staying awake for longer than 90 minutes unless we are out somewhere and he is being massively stimulated in which case he might make it to 2 hours.
He then naps for 45 mins. So over the course of a day he will typically have 5 naps - is this ridiculous?! It feels like he is getting in and out of the crib all day long when we're at home!
The HV advised I should try to stretch him to stay awake for 2 hours, which could result in him having 4 naps each day instead, but I am not sure if this is a good idea: he generally becomes a shrieking, inconsolable mess when tired during the day :-S