DD (just over 8 months) has only ever had short naps during the day, but is usualy fairly predictable as to when she will take them. For the last couple of days, however, she has stayed awake for hours longer than she usually does. This morning she was up at 7.15 or so, and she is still awake (nearly 5 hours later)! She has only just learned to roll onto her tummy (she hated tummy time) and several times has got onto her tummy on her cot and got stuck. Could her lack of naps be related to this development? She has 2 teeth, so I don't think it's a teething thing.