Although this can be the process taking place in a number of cases I would like to point out that we can never take anything for granted. That is my issue with viewing our hairloss condition that way, taking things for granted.
How can someone identify that it's just telogen?
You are an individual with Male pattern baldness who is losing hair on a treatment, why would you suddenly believe that your condition has stopped and all of what is happening is a shedding completely unrelated to it? Because many times nobody is growing back anything, and it's not like all people are experiencing this shedding (further hairloss) on treatments either, it would be very naive.
This is a topic that I completely agree with Almas. There is no way that I jump on a treatment and I will continue it after maximum 3 months if I see that I am still shedding or haven't had any sign of hair progress. Many people disagree with me but I know my body, when I tried Dutasteride for first time my shedding stopped in just 1 day. I combed and nearly nothing came out... after a few months I adjusted my treatment for economy and suddenly I started to lose a lot of hair and even developed a spot on my crown in just one month... everybody said that it was normal, that it's just "the shade" and yada yada but I refused to believe this so I readjusted my treatment and again next day I had very little shedding and improved all forward... if I had listened to people back then I may had been on the way to norwood 3 whereas now I am sitting at NW1... I don't know what there is to see during one whole year of hairloss progression to reach the conclusion that your hairloss is indeed progressing and the treatment is not the right choice. It's just playing with your own life and mental sanity...
I would even go as far as saying that I already know what will work or not within two weeks.