Premature Delivery

Preterm birth is a major cause of mortality and long-term disability. Bacterial vaginosis (BV) is a frequent form of dysbiosis that is often asymptomatic and increases the risk of preterm birth. BV is usually diagnosed using conventional tools such as the Nugent score. Molecular diagnosis of BV has now been shown to be more reproducible and to provide a more accurate characterization of dysbiosis. The main objective of this study is to evaluate the effectiveness of a self screen and treat strategy for vaginal flora dysbiosis, based on molecular point of care (POC) multiplex technology before 18 weeks' gestation, in reducing the rate of preterm birth among pregnant women at high risk, compared with usual care. The hypothesis is that a Screen-and-Treat strategy using molecular biology among women with previous preterm or/and an history of late abortion could be effective in reducing preterm births by 40%.

1. Construct intelligent management intervention plan for parents of preterm infants from hospital to family based on the medical and health system suitable for China's national conditions. 2. Clinical randomized controlled trials were conducted to verify and evaluate the feasibility and application effect of the intervention program.