When the Juvenile Hairline Matures, What Happens to the Hair?

Hello doctor, I have been wondering about this and have found no answer. When the juvenile hairline matures, what happens to the characteristic of the hair on the juvenile hairline as this happens, does it miniaturise? Does it all go at once or one hair at a time? You suggested these hairs go through aptosis but during this process would these hairs become weaker every cycle?

Thank you

I have not seen miniaturization in those undergoing the shift from a juvenile to mature hairline as a rule. It just falls out without miniaturization, but this is not an all or nothing statement as miniaturization could occur.