[Construction vs. development: the source of our misunderstandings concerning the beginning of life].

This essay argues that the failure of our public debates over abortion and embryo-destructive research is due, to a large extent, not to different valuation of individual human life but to different conceptions and intuitions concerning the process of gestation, one group treating the process as construction and another treating it as development. These two incompatible models of reproduction are shown to explain the various positions commonly encountered in these life-related debates. Finally, the historical, theoretical, and intuitive strengths of each model are examined.