Since the 1980s, the Center for Disease Control and Prevention has changed their recommended childhood vaccination schedule from 22 doses of seven vaccines by the age of six to 50 doses of 14 vaccines by the age of six. In a similar timeframe, the prevalence of Autism Spectrum Disorders (ASD) has increased. It is possible that these two are related. This paper intends to hypothesize that Transcranial Magnetic Stimulation (TMS) could be utilized to detect levels of mercury and aluminium in the brain, due to the magnetic properties. TMS works by sending magnetic field pulses into both the Peripheral and Central Nervous System. If we can connect the magnetic field pulses to the magnetic properties of mercury and aluminium, we can potentially track how the mercury has affected the brain and determine if this may have caused ASD.