AneuploidyMaternal AgePregnancyDown SyndromePaternal AgeTrisomyPregnancy, High-RiskPreimplantation DiagnosisBirth OrderAmniocentesisChromosome DisordersNondisjunction, GeneticChromosome AberrationsIn Situ Hybridization, FluorescencePrenatal DiagnosisKaryotypingPregnancy OutcomeChromosomal InstabilityInfant, NewbornPregnancy Trimester, FirstParityChromosomes, Human, Pair 18Gestational AgeChromosome SegregationAbortion, SpontaneousPolar BodiesNuchal Translucency MeasurementUltrasonography, PrenatalMosaicismCongenital AbnormalitiesBirth WeightPloidiesPregnancy ComplicationsChromosomes, Human, Pair 21MeiosisPregnancy Trimester, SecondCrown-Rump LengthChromosomes, Human, Pair 13Chromosomes, HumanFetal DiseasesAbnormal KaryotypeDiploidyFertilization in VitroChorionic Gonadotropin, beta Subunit, HumanRisk FactorsPolyploidyBirth CertificatesPregnancy-Associated Plasma Protein-AFetal DeathSperm Injections, IntracytoplasmicSex Chromosome AberrationsSpermatozoaCesarean SectionAneugensInfant, Low Birth WeightReproductive Techniques, AssistedMothersInfant MortalityChorionic Villi SamplingPregnancy, MultipleChromosomes, Human, XOocytesInfertility, MalePremature BirthCentrosomeMad2 ProteinsHernia, UmbilicalKaryotypeMitosisMetaphaseGastroschisisCytogenetic AnalysisChromosomes, Human, 21-22 and YNasal BoneSex ChromosomesSpindle ApparatusNeckPrenatal CareChromosomes, Human, YGenetic TestingAbortion, HabitualGenomic InstabilityChromatidsChromosomesLive BirthStillbirthXYY KaryotypeCohort StudiesPerinatal MortalityBirth IntervalsKlinefelter SyndromeInfant, Small for Gestational AgeRetrospective StudiesEmbryo TransferY ChromosomeCase-Control StudiesAbortion, EugenicPregnancy in AdolescenceDNA, NeoplasmComparative Genomic Hybridization