If someone is a Norwood 6 in their 50s, what are the chances of them becoming a Norwood 7 later on in life?

The  simplest way to predict whether you will progress is to look at pictures  of your hair from every five years for the last 20. . In addition, observe your siblings and parents as well as pictures from grandparents. This assumes that you are not using any medications, PRP, nutraceuticals, or low level laser which can improve your outcome. You can review this with a hair expert. Good luck.Jeff Rapaport MDRealself All-star

knowing the exact pattern that hair loss will follow with time is tough to do, because hair loss can be so variable for each individual. The best indicator is family history and your own trajectory of hair loss. 

Genetics and ethnicity are a factor. I have seen hair loss progression even in the 50's. Some ethnicities are more prone to losing hair at higher ages including Middle Eastern people. I would recommend getting a consultation with a hair transplant surgeon to understand the cause of your hair loss and to consider medical vs surgical options to prevent further hair loss. A microscopic evaluation of your miniaturized hair will be a good start.

Whatever your current hair growth and loss has stabilized at is how it will stay until your late 60 to early seventies. At that time you will have a new degree of hair that may thin-out what you have now, and may possible have extended borders (less likely).

As someone gets older in life we would expect for their hair loss to stabilize as opposed to a person in their early 20’s who may still experience more loss.  It is still possible to lose more hair from your 50’s into 60 -70’s.  Using medical treatment can help to reduce that risk.

Usually the Norwood Class 6 pattern of balding remains as a Classs 6 pattern and does not advance to a Class 7 pattern. The older you are the more certain it is