They say that the mother of a child with autism experiences a level of stress comparable to that of a combat soldier.
Grace Fava certainly did.
Her two boys, now aged 15 and 13, were diagnosed with autism at the ages of three and two respectively and the family plunged into near-constant crisis, including a three-year period of faeces smearing and several terrifying occasions when they escaped naked from the windows.
"In the early days it was horrendous," Ms Fava said.