Donny,
Usually, pending your condition as discovered with a MRI study, you will get one injection. Then some months later it will be determined if a second injection is needed - again after a MRI study.

Some of our friends have had three, on of them only one. It depends on how severe the knee problem might be.

Donny, the most important part of this is to be dealing with a reputable doctor who specializes in stem cell and other medical injections like these.

Deane