My daughter is 16 and she got her period on christmas 2 years ago and now she hasn't had it since September 16, 2006. Is this normal?

It may or may not be normal. Is she thin? Is she athletic?

Just a few questions to go from.

Yes if she is of a low BMI then it may be symptomatic of an eating disorder-although I would have thought you would have mentioned her weight if it was a concern.

Cheers-HI janine.!