Hello all, wondering if anyone has any experience of this? Have been keeping data on my son's sleep patterns for months and notice that every eight weeks (+ or - a few days) he has a 'high' period lasting up to a fortnight of hardly sleeping (the rest of the time he sleeps really well). By day he's also wired, more hypersensitive than normal and far away (this may be sleep dep tho?) Does anyone else's children cycle in this way? Does anyone have any idea why this might be? 'Highs' are becoming much more pronounced since puberty started and tougher to get through. He's thirteen and wonderful and severely autistic (non verbal, sensory integration difficulties). Thank you 