The purpose of this study was to collect data on uterine sibling groups (i.e. children born to a mother) in selected communities in Ghana in order (1) to investigate interactions of variables and provide demographic information; and (2) to test hypotheses about sex preferences in a comparative study of material from Europe and Asia. Variables Social characteristics of mother, mode of inheritance, sector (urban/rural birthplace and residence) history of birth events, number and sequence of children, birth intervals, infant mortality.