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Hormonal and behavioral determinants of the secondary sex ratio
1Department of Anthropology, Arizona State University, Tempe 85287-2402, USA.
Social Biology
|January 1, 1995
Abstract:
The timing of insemination relative to ovulation and the frequency of insemination appear prominently in analyses of variations in human secondary sex ratios. Explanations invoking these variables are shown to be inadequate. A new synthetic model of sex determination is proposed in which the sex of offspring is powerfully determined by the state of the cervical mucus. The cervical state is then shown to be a function of hormonal factors endogenous to the female in interaction with the effects of previous inseminations.
Keywords:
Artificial InseminationBehaviorBiologyCervical MucusCervixCoital FrequencyDemographic FactorsEndocrine SystemFertilizationGenitaliaGenitalia, FemaleGerm CellsHormonesLiterature ReviewMenstrual CycleMenstruationPhysiologyPopulationPopulation CharacteristicsPopulation DynamicsReproductionReproductive TechnologiesSex BehaviorSex DistributionSex FactorsSex Ratio--determinantsSperm TransportSpermatozoaTime FactorsUrogenital SystemUterus