There is a transplacental form of acquired hemophilia: http://www.jpeds.com/article/S0022-3476%2895%2970132-X/abstract
This disease is caused by polyclonal immunoglobulins (IgG1 and IgG4) against the A2 and C2 domains of factor 8. So acquired hemophilia is an autoimmune disease. By the transplacental form the maternal IgG antibodies causing this disease in the newborn. As far as I know IgG antibodies are transferred with breast milk too. Can breast milk cause this disease?