A prospective trial is a type of clinical study where participants are identified and then followed over a period of time to observe and collect data on specific outcomes or results. This type of trial is often used in medical research to evaluate the effectiveness and safety of new treatments, interventions, or preventive measures. Prospective trials are typically well-controlled and designed to minimize bias, making them a reliable method for generating evidence-based findings. By following participants forward in time, researchers can gather valuable information on the long-term effects and outcomes of the intervention being studied.