Concerned that 15 year old DD is oversleeping! She can go to bed at 10 and not wake until midday or 1pm (on a weekend). This causes problems on school days where she goes to bed at 9/10 but massively struggles to get up for school. She is supposed to leave about 10 to 8 but usually isn't up to get bus and ends up being driven and usually arriving late. It is rare she gets to school every day, she definitely is late 2/3 days per week.
The days she does get up early enough to get to school, she will quite likely need a sleep when she gets home about 4pm! This has been going on for at least a year with little change. Bloods were done last year but showed nothing (full blood count, coeliac test not sure what else).
I am pretty sure she isn't staying up late without us knowing - we have poor internet so tend to know when anyone is using it!
Is this just a growing stage, hormones, or something else?