Objectives: This study examined sex ratios in 6 counties in China.
Methods: Data from a household survey (n = 5756) were retrospectively analyzed.
Results: A normal sex ratio was found for children less than 18 years of age. Significant differences in sex ratios and family size were observed between the household survey data and population registers.
Conclusions: The findings indicate a high number of unregistered female births and are consistent with calls for a rethinking of Chinese population policies in the direction of a more collaborative policy based on female education and participation.