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 stan...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展开更多
文摘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
