Effect of cervical pessary on pregnancy outcome in patients with twin pregnancies: a systematic review and meta-analysis

Conclusion: The cervical pessary can extend the gestational week of short-cervix twin pregnancy without clinical symptoms, reduce the premature birth rate before 34 weeks of gestation, improve pregnancy outcome, reduce neonatal mortality, reduce necrotizing enterocolitis incidence, neonatal sepsis incidence, and improve neonatal outcome. For patients with a cervical length less than 38mm, a cervical pessary can be performed to extend the gestational week. For patients with a cervical length less than 25mm, a cervical pessary can effectively prolong the gestational age and improve the maternal and fetal outcomes. The cervical pessary is safe for patients with twin pregnancies. Suggest that twin-preganct-patients with CL<38mm should consider take cervical pessary in advance. In terms of long-term efficacy, there is no evidence of cervical support placement on the long-term maternal prognosis. In terms of economic benefits, cervical support is better than vaginal progesterone, but this conclusion still needs more research to prov