Purpose: To clarify the relationship between light vaginal bleeding (LVB) before physical examination-indicated cerclage (PEIC) and perinatal adverse outcomes.
Methods: This was a retrospective cohort study involving 94 singleton pregnancies undergoing PEIC <26 weeks of gestation at a single perinatal medical center between 2008 and 2015. The primary outcome was set as spontaneous preterm birth (sPTB) <34 weeks of gestation.