摘要
An epidemiologic survey of infertility was carried out in Dalian district from September to December 1989. A two-stage random sampling was used to select subjects. Date were collected by household, interview with standardized questionnaire.Quality control was strictly executed. The respondent rate was 96%. A total of 5 918 couples were included in the analysis. The prevalence of primary infertility was 1.01% in this district. There was no significant difference between urban and
