Author Contribution
Y L: data collect, summarize the data, data analysis, follow-up, drafting and revised the article. YN L, J Z: obstetrics and gynecology data analysis. JC L, YC Z, KM L: data statistics, drawing. XM F, revised the article. JG W: plan the study, study design, revised the article. All authors critically reviewed the manuscript, provided important intellectual input, approved the final version and agreed to be accountable for their contributions.