| Summary: | Plain Language Summary Reproductive tract infections (RTIs) can cause serious health problems, such as spontaneous abortion and congenital diseases in pregnant women and their foetuses. However, there is a lack of studies focusing on the prevalence of RTIs and their trends among women who intend to conceive. This cross-sectional study examined data collected from 439,372 women during their preconception care to investigate the trend and related risk factors of the prevalence of RTIs, thereby providing essential data for their prevention. Participants were women from all 39 counties in the Chongqing Municipality of China, and data were collected between 2012 and 2016. We found that the overall prevalence of the six types of RTIs among these women was 5.03%, which was relatively lower than that in other populations in previous studies. Age, education level, history of pregnancy or delivery, and history of abortion were all associated with the prevalence of RTIs. The prevalence trend from 2012 to 2016 was V-shaped decreased steadily from 2012 until 2015 and rose slightly in 2016. Our data suggested that this trend might be influenced by changes in the proportion of ‘high-risk’ women, that is, women with higher age, lower education level, and a history of pregnancy or induced abortion. This study suggests that health education and regular screening are necessary to face new challenges experienced by older women or women with previous pregnancies who intended to get pregnant in recent years in China.
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