With PRP, you should see visible changes around 8-12 weeks post-first treatment, sometimes as early as 6 weeks. If you are not seeing any visible changes after 3 sessions, there are a couple things to do. First, you can follow up with your PRP injector and discuss why there may be a potential delay in your growth, sometimes lack of growth is due to hormonal/nutrient/metabolic deficiencies. Second, you always can seek PRP injections elsewhere. Keep in mind that there is a technique with PRP extraction, it's oftentimes manual, so there can be some human error with it. Your PRP liquid should always appear cloudy or hazy, some are more yellow than others.Best, Dr. Anil Shah