Jo,

yes, not having a cause has both drawbacks and ironic advantages. It would have been best I guess to know a cause that could be treated and prevented for the next time. My doctor said that some consider stillbirth with no cause to be a continuation of Sudden Infant Syndrome, which usually has no reason or warning. It has risk factors (alcohol, drugs, smoking, asthma, overweight, older) but I had none of those so I can't mitigate against them anyway! Frustrating.

Thanks