My mum's death was sudden and unexpected, but the paramedics managed to get her to A&E before she died. No-one suggested a PM. I assumed it was because the cause of death was obvious (infection) she was in the hospital, and she'd been examined by a senior doctor on arrival.Tiny me rail.
When my mum died in her bed at a nursing home she had to have a post-mortem. Not because it was suspicious as such but because it was sudden and she was alone.
Maybe because this poor babies death was attended by physicians a pm wasn’t necessary?
Although it was unexpected, she was very elderly and her health had been failing so it wasn't too surprising either. I don't know if a much younger person would have had a PM.
I do wonder if there are assumptions about certain groups of people - premature babies, very frail people with health conditions, very frail and elderly people - that means less questions are asked when they die.