Hi I will try to keep this brief. 16 year old daughter started her periods age 13 and had a normalish cycle for around 1 year ( although some months were very light usually lasting 1 day). Two years ago her periods became more irregular and she hasn’t had one in over six months now. Dr has done blood work ( normal apart from low folate) urine samples ( all fine) and has referred for scans at the hospital which again were normal fine. Has anyone else had something similar? I am inclined to think exam stress etc may of caused this as daughter is very hard on herself and pushes herself academically but she says she isn’t stressed?