Abstract: A method for processing blood samples in order to produce DNA complex patterns for diagnostic applications. The method includes the aggregation and deposition of the DNA complex from the blood of a human being in order to form a unique pattern which can be used as a medical diagnostic tool to identify a change in the body caused by a specific physiological or pathological condition. The method identifies a change in the body by comparing the pattern of a person before a specific physiological or pathological condition to the pattern of a person after the condition. The specific condition causing the change is then determined by identifying and associating the unique pattern after the condition to the specific condition or disease based on comparative appearance. The present invention can be used as a diagnostic tool to aid in the determination of, among other things, the sex of a human fetus within a few days after conception, and the presence of a cancerous condition in the earliest stage of the disease.