26 years old and a Class 7 pattern now, why?

At 17, I was norwood 0 with a perfect hairline, however by the time I hit 22, I was around norwood 6/7 – around the age of 21 I started to razor shave my head and have done since (I’m nearly 26 now). Now I’m wondering whether my hairloss is considered aggressive and extreme or ‘normal’?

For many young men who inherited advanced balding (Class 7 pattern) find that they get there by the age of 26. That seems like you.