Study group assignment
Grouping: The women were grouped according to different types of vaginitis (AV group, BV group, VVC group, TV group, VVC+AV group, VVC+BV group, AV+BV group, and AV+TV group) and normal women without vaginitis (Normal group). Among them, we totaled AV, BV, VVC, and TV groups into single vaginitis group and totaled VVC+AV, VVC+BV, AV+BV, and AV+TV groups into mixed vaginitis group. And we compared the demographic characteristics, risk factors, clinical symptoms and signs, laboratory characteristics, and pregnancy outcomes of mixed vaginitis group with single vaginitis group and normal group.