I worked in a five star hotel once and a lady in the middle of the night had a miscarriage. She kept extending her stay saying she liked the room and didn't wish to swap. When she did check out the housekeepers found the fetus in the bed which was covered in blood. It appeared the poor lady was so distressed at losing the baby she was cuddling it for days on end.
And in the end, the hotel sold the mattress at an employee sale.
Found on this thread on Reddit.