A collection consists of several studies that are in some way connected. They can belong to the same research series, research infrastructure, or come from the same research expedition.
We also provide access to the special collections “Swedish party programmes and election manifestos” and the Swedish Gallup Institute's public opinion surveys from 1942 to 1956.
Animal studies have shown that exposure for PCBs, can effects the menstrual cycle and cause reduced fertility in females. In humans, fertility can be measured by examining the waiting time to pregnancy, ie the time betwe...