Does hair removal have an effect once?

Does hair removal have an effect once?

Does hair removal have an effect once?
OPT hair removal usually takes three to six times to achieve the desired result.
There are two reasons for this:

1)The hair follicles are mostly bundled together in three groups and open in the same pore. One of the hairs is a hair that grows from one of the three hair follicles below it, so one treatment can only destroy one a hair follicle in the group;

2)The hair cycle is divided into the growth period, the regression period, the cessation period, the laser hair removal rate in the growth period is 75%, the regression period is 25%, and the cessation period is almost ineffective.