SIDS. Sids still remains largely a mystery. In recent years, some of the new findings include: some of it is genetic and runs in families; some of it is clearly due to parental intentional injury; some of it is accidental--either a parent lying on the infant while asleep, or by bedding; there was a large reduction in sids events when md groups campaigned to have babies lie on their back for sleep.
Brain Stem Problem. The latest research focuses on the brainstem as a potential cause of an abnormal breathing response when more oxygen is necessary. The hippocampus may have an abnormal " dentate gyrus" is some babies which may play a role in abnormal breathing recovery. http://www.medicinenet.com/script/main/art.asp?articlekey=185460.