RESUMEN
Objective To provide a basis to satisfy the need for family planning of women of reproductive age,according to the analysis and estimation of family planning status of married or in union women of reproductive age among China,Japan,India,South Africa and the United States of America.Methods U test and Chi-square test were applied to analyze the current situation (1970-2016) and tendency (2017-2030) of family planning indicators of the five countries from 1970 to 2030,which were selected from open database of World Contraceptive Use 2016.Results Compared with the family planning status in 1970,there was a significant change in total demand for family planning,contraceptive prevalence and unmet need for family planning (P＜0.001).To be specific,in 2016,contraceptive prevalence of married or in-union women of reproductive age in China,Japan,India,South Africa and the United States of America was 83.35％,59.9％,56.4％,64.9％ and 73.7％,respectively;unmet need for family planning was 3.8％,13.1％,15.5％,12.2％ and 7.2％,respectively.Besides,contraceptive methods composition in the five countries were changed in 2016 (P＜0.001) and the prevalence of modern methods was higher than traditional methods.Meanwhile,the percentage of demand for family planning satisfied with modern methods were increasing from 1970 to 2016.On the other hand,the projections of total demand for family planning,contraceptive prevalence,unmet need for family planning,composition of contraceptive methods and unmet need for modern methods would change from 2017 to 2030 (P＜0.001).It was estimated that,in 2030,China would have the largest number of people using contraceptive methods and India would have the largest number of people with unmet need for family planning.Moreover,China and India might be the countries with most users of modern methods,and India might be associated with the most users of traditional methods.Conclusions Considering current and projected status of huge total demand for family planning,high contraceptive prevalence,low unmet need for family planning,it is essential to supply approximate contraceptive methods.