Is there generally something going on at 10 months that increases baby sleep?
He's gone from 7/7:30am wake up to 9am wake up in the past week. He will wake about 7:30 for 10 mins then fall back asleep til 9am. He's still snoozing now and it's nearly 10am 
A bit of background - he's almost 10 months, he's got 4 teeth coming through at the same time (although they don't appear to be bothering him), it looks like he's trying to transition from 2 naps and 3 bottlers per day down to 1 nap and 2 bottles, he's very active and is trying to walk.
There is just so much going on for him at the moment I'm not surprised he's sleeping so much.
Is this normal at his age?