How will the HAIRCHECK instrument tell me whether or not the follicle will stop growing?

The HAIRCHECK instrument measures hair bulk.  Follicles that stop growing do not add to the hair bulk on your head.  Everyone with genetic balding will show patterns of reduced hair bulk when this is measured. I answered this in past tense.  If you are asking me about the future, I don’t have any way to predict it. If you have genetic balding, then it is almost a guarantee that you will see more and more of it as you get older. see photos here on use of HAIRCHECK instrument:  https://baldingblog.com/2017/01/10/value-haircheck-bulk-measurements-two-patients-seen-today/