Why are you doing this study? 

We are doing this study because about 50% of babies who have TSC will also develop autism (ASD).  We can diagnose TSC before birth but not ASD.  We are hoping to learn more about the link between TSC and ASD.  We will do this by looking for biomarkers (something that shows the presence of a disease like a blood test, MRI, EEG pattern, etc.) that are common in both diseases.  We hope this will help us learn how to prevent or treat autism in babies who are have TSC.