Fetal DeathPregnancyFetal DiseasesHydrops FetalisPregnancy OutcomeParvovirus B19, HumanFetal Growth RetardationUltrasonography, PrenatalPregnancy Trimester, SecondGestational AgePregnancy ComplicationsFetal MortalityInfant, NewbornCell DeathCause of DeathStillbirthDeath CertificatesAbruptio PlacentaeAbortion, SpontaneousColaDeathMaternal AgePlacenta DiseasesInfant MortalityAborted FetusBirth CertificatesPlacentaPregnancy Complications, InfectiousPerinatal MortalityPlacental Function TestsFetal ResorptionAgrochemicalsParvoviridae InfectionsPregnancy, High-RiskAmniotic FluidAbortion, InducedAmniocentesisNeosporaMaternal-Fetal ExchangeDeath, Sudden, CardiacAutopsy