but as he grow older, i think around 9-10mth onwards, his nap frequency decrease but the time of each nap increase. he slowy can nap 45 min then slowly to 1hr until now, he sometimes can nap for 1.5hrs or even 2hrs (when he is VERY tired) for each nap.
IMO i dont think your girl is lacking of sleep. cos young babies, yes they do nap alot during the 1st 3 month but majority of them still cant sleep thru the night and will wake up every 2-3hrs for milk, and some dont even wanna sleep back after milk, want to play. so if your girl can sleep thru the night by now OR if she will still wakes up for milk but sleep back right after milk, i think should be okay.
btw hw many times she nap everyday? i rmb last time though dear son nap for 30min only, but he will nap again within 1hr after he wakes up. other babies at his age nap around 2-3x but he took around 5-6 naps each day but total add up, his nap hours was 'enough' =)