HypocalcemiaPregnancyHypoparathyroidismPregnancy OutcomePregnancy ComplicationsParathyroid HormoneMagnesium DeficiencyCalcium GluconateThyroidectomyPregnancy, AnimalParathyroid GlandsPregnancy, EctopicPseudohypoparathyroidismHypercalcemiaReceptors, Calcium-SensingPregnancy Trimester, FirstParathyroidectomyPregnancy RatePregnancy Trimester, ThirdCalciumPregnancy Complications, CardiovascularPregnancy TrimestersPregnancy TestsPregnancy, MultiplePregnancy in Diabetics22q11 Deletion SyndromePregnancy, TubalPregnancy Trimester, SecondHyperparathyroidism, SecondaryPhosphorusPregnancy Complications, NeoplasticPregnancy in AdolescenceRicketsPregnancy Complications, InfectiousHyperparathyroidismAbortion, SpontaneousInfant, NewbornMagnesiumCalcitriolPregnancy ProteinsVitamin DPregnancy, UnplannedPregnancy, High-RiskPregnancy, UnwantedDiGeorge SyndromeHyperparathyroidism, PrimaryPhosphatesGestational AgeVitamin D DeficiencyTetanyCalcium Metabolism DisordersParathyroid DiseasesPregnancy Complications, HematologicThyroid DiseasesCalcium, DietaryCalcitoninGraves DiseasePregnancy, ProlongedPre-EclampsiaPregnancy, TwinPlacentaMagnesium SulfateDiphosphonatesHypophosphatemiaRenal OsteodystrophyFetal DeathOsteomalaciaParathyroid NeoplasmsBone Density Conservation AgentsCalcium ChlorideHyperphosphatemiaAbortion, InducedPregnancy, AbdominalUterusPregnancy Complications, ParasiticPregnancy MaintenanceChelation TherapyRetrospective StudiesUltrasonography, PrenatalEmbryo ImplantationSyntaxin 16Prospective Studies