What is the most general reason hair loss happens?
If it is hereditary, is there any way to know if you ‘will’ lose some of your hair if you haven’t lost any yet?
Does shaving ones head many many times encourage hairloss?
General info on hair loss and also here.
Shaving and hormonal changes don’t really have an impact on pattern baldness, so it seems, and genetics, while having a effect, aren’t the primary one.