As long as the posterior occipital donor area is rich in hair resources and the hair loss area is large, one hair transplant operation may not reach the original hair density. If the hair loss area is not large, one time may be enough.
The specific situation can't be determined until the doctor sees your actual situation.
You can go to Beijing Sino-German Hospital, CCTV-2 Health Road and CCTV- News Channel to see the weekly quality report. Hair transplant is very professional.