Death is a mysterious and anything to do with it is viewed with apprehension, not least of all the postmortem examination. Most people dread this examination performed on a relative and it is abhorred by some religions.
The value of the examination is questioned by many as it may not be if any value to the deceased. What is sometimes even worrying to some relatives is that some parts (tissues) of thee dead body are removed by the doctors, which parts the deceased is buried without.