Blar i forfatter Masteroppgaver i profesjonsstudiet medisin "Gabrielsen, Ingrid"
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Time-trends in secondary sex ratio of firstborns and polychlorinated biphenyls in Norway for the time period 1967 - 2018
Gabrielsen, Ingrid (Master thesis; Mastergradsoppgave, 2020-08-31)Background: The secondary sex ratio (SSR), the ratio of males to females at birth, has been of much interest in epidemiologic research, as the ratio may be affected by endogenous and exogenous factors. There have been several claims of a declining SSR from the second half of the 20th century, and environmental contaminants, especially persistent organic pollutants (POPs) including polychlorinated ...