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Abstract
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Keywords:
AsiaBehaviorChinaDemographic FactorsDeveloping CountriesEastern AsiaExaminations And DiagnosesFetusGenetic TechnicsLaboratory Examinations And DiagnosesLegislationPopulationPopulation CharacteristicsPregnancyPsychological FactorsReproductionSex Determination--legal aspectsSex DistributionSex FactorsSex Preference--legal aspectsSex RatioValue Orientation