The mechanism for the disorder is passive auto-immunity, in which maternal antibodies are transported transplacentally, and result in tissue damage in the fetus, and subsequently in the newborn.

• 该疾患的机制是被动自身免疫，母体抗体通过胎盘进入胎儿，导致胎儿组织破坏，从而在新生儿出现症状。