Several studies found a strong association between the use of acetaminophen (e.g., Tylenol, Paracetamol) and autism Autism is also associated with several prenatal factors, including advanced age in either parent, diabetes, bleeding and use of psychiatric drugs in the mother during pregnancy. Autism was found to be indirectly linked to prepregnancy obesity and low weight mothers. It is not known whether mutations that arise spontaneously in autism and other neuropsychiatric disorders come mainly from the mother or the father, or whether the mutations are associated with parental age. However, recent studies have identified advancing paternal age as a significant indicator for ASD. Increased chance of autism has also been linked to rapid "catch-up" growth for children born to mothers who had unhealthy weight at conception.