Secular trends and geographical variations in sex ratio at birth

Numerous studies have established the presence of secular trends and geographical variations in sex ratio at birth, albeit with mixed and often contradictory results. In addition, a multitude of environmental, social, economic, demographic and other factors has been proposed to influence the sex ratio at birth, thus complicating the interpretation of both secular trends and geographical variations. In this paper, the current state of knowledge on these issues is presented and critically assessed.
Source: Early Human Development - Category: Perinatology & Neonatology Authors: Tags: Best practice guidelines Source Type: research