Pregnancy encompasses core socio-political issues: kinship, demography, religion, gender and more. In any society, the ontology of the pregnant body and the embryo-fetus holds core existential concerns. Is a pregnant body one or two beings? When does personhood begin? Yet pregnancy is still a marginal topic in archaeology and its onto-political consequences have scarcely been raised. It would be ludicrous to claim that pregnancy or childbirth is part of the grand narratives of prehistory. Also in scholarship centring theoretical perspectives on the body and personhood the pregnant body is absent. This article poses fundamental questions of the body-politics of pregnancy. We develop concepts from material feminism, medical ethics and philosophy to interrogate pregnancy and provide a case study to demonstrate how these concepts can work in practice from the Viking Age. The questions posed, however, are not limited to the Viking period. Our overall objective is to centre pregnancy as a philosophical and political concern in archaeology writ large. We develop new thinking and language to this end, which can be used to examine the politics of pregnancy in other periods and regions. Ultimately, we discuss the absence-making of pregnant bodies from our sources as well as from archaeological discourse.