Prevalence and risk factors of infertility at a rural site of Northern China

This is a cross-sectional study. We conducted a face-to-face questionnaire survey from July 2014 to October 2014 involving 4,232 women who were at childbearing age in Suizhong, a medium-sized, representative county located in Northern China.A total of 22 villages from Suizhong County were investigated in this survey. This study was approved by the regional ethical committee.