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My almost 9 month old son has stopped napping longer than 40-50 minutes. We recently have begun lengthing the time he is awake first thing in the morning from 1 hour to 1 1/2 hours because he wouldn't fall asleep quickly anymore after being up for only one hour. He repsonded very well to this and was taking two 2 hours naps and maybe a 40 minute nap in the late afternoon. This only lasted 4 days. Starting yesterday his naps have ranged from 40-50 minutes long. He doesn't wake up crying, but just talking to himself. I've always left him in his crib for at least one hour for each nap and that will usually allow him to fall back to sleep for a much longer time. Unfortunatly leaving him in for that hour hasn't been working so I even extended it for 1 1/2 hours, but that still isn't working! I am not sure what to do??? He's not extremely cranky, but is a bit fussier than ususal. I did notice last night that he has a little hole/cave where his first tooth will be popping out in the next few days. Coud this have anything to do with it?