DS is 5 months old and is still taking 4 naps a day - usually 30 to 45 minutes each with about 2 hours of awake time between each. Based on my obsessive reading about sleep most babes his age go to 3 naps by now or 6 months.

When did you go to 3 naps?
What did your nap schedule look like?
Did dropping a nap make the remaining naps longer?