Secular trends in sex ratios at birth in North America and Europe over the second half of the 20th century.

Abstract

CONTEXT A previous study showed that significantly more boys were born in southern latitudes in Europe than in northern latitudes and the converse pattern was observed in North America. OBJECTIVE This study analyses secular trends in gender ratios for live births over the second half of the 20th century. DESIGN, SETTING, PARTICIPANTS Analysis was… (More)

4 Figures and Tables

Topics

  • Presentations referencing similar topics