PubMed · 1953 · 44 citations · 0 references
Social SciencesDemographyMaternal HealthReproductive DemographyReproductive EpidemiologyReproductive HealthBirth RatesChildbearing PatternsReproductive SeasonalitySeasonality Of ReproductionSex DistributionSex RatioPopulation Sex RatioSeasonal Birth PatternsSeasonal VariationSeasonality Of BirthsSex Ratio Estimation