Got to experience that first-hand when my partner lost her pregnancy. We went in for the procedure to remove the nonviable fetus and were advised we had 14 days to arrange for a mortuary to take the remains if we wished to keep them, which we did. At 7 days when the mortuary tried to arrange for pick-up, we were informed that the hospital had disposed of the remains. It was "very uncommon" for people to want to take the remains, so they got lax in following their procedure and jumped the guns. Left us nothing to take home. It still sucks.