Proposal of the Acronym “SIUDS” for Unexplained Stillbirths, Like “SIDS”

The authors, propose that also a sudden death during pregnancy that remains unexplained after an in-depth autopsy, should be considered as a syndrome and referred with the acronym “SIUDS”, e.g., “Sudden Intrauterine Unexplained Death Syndrome”, like “SIDS” for “Sudden Infant Death Syndrome”. This suggested definition is based on the presence in these pathologies of common developmental abnormalities of both the autonomic nervous system and the cardiac conduction system, associated to the same preventable risk factors.