Fig. 1

Schematic illustration of women included in the study. From women’s health survey 15,683 women participated in the survey. Several exclusion criteria were used to reach the final sample for this study. Pregnant women were 1122 during the survey period and were excluded in the first step. The other criteria used for eligibility to this study was women should be married or were in union with their couple during the survey. A significant number of women excluded by failing to fulfill this criterion. After screening for sexual activity and fecundity we reached the final sample size of 6854