"This article describes and analyses recent changes in the social institutions and cultural practices which have traditionally supported high fertility among the Kikuyu of Central Province, Kenya, and assesses the extent to which such institutions and practices retain their significance in the context of the changing value of children. The material and symbolic value of children to the Kikuyu is analysed, using methods and concepts derived from social anthropology.... After briefly profiling each of the communities of study, the article is organised around three themes which correspond to the key social institutions that shape fertility motives: marriage, kinship and religion. A fourth theme which runs throughout the article is the changing strategic role played by these same institutions in regulating or enhancing fertility." (SUMMARY IN FRE)