Unless legally mandated, like found dead in suspicious circumstances, they aren't usually done. A survivor has to ask for the autopsy before the body is processed with embalming fluid. Many families aren't ready to dissect their loved one. Then you have to find a qualified person to do it. Your family doctor probably can't. And not all mortuaries allow it either, the body may have to be moved, for a fat fee. The permitying mortuary wants a fee too. Call the county medical examiner--who knows about this? Then be prepared to spend thousands, maybe in cash for a moonlighting medical examiner. I know all this from having my mother autopsies, cost $5000 for the M.E. and about $600 for moving the body around. All these barriers reduce the number of autopsies.