Hello girls, I had a tragedy?

Hello girls, I had a tragedy ? I gave birth at 39.4 weeks, a boy weighing 3460 grams and 52 cm long. The baby lived only 3 days and died ??? After an examination, they said that the baby had liver hemorrhage from which it could be caused and the reason who knows, just our doctors say nothing, although I gave birth normally and this is my fifth birth, maybe I wrongly accepted the birth, what affected the death of the baby?