Figure. Changes of Maternal Baseline Risks and Causes of Preterm Deliveries During the COVID-19 Pandemic.

Analyses of maternal baseline risks (A) and causes of preterm deliveries (B) from the quality-assurance registry of Hesse, Germany, comparing the prepandemic period (2017-2019) and the COVID-19 pandemic (2020) in preterm births at less than 32 weeks are presented as odds ratios (ORs) and 95% CIs. CTG indicates cardiotocography; HELLP, hemolysis, elevated liver enzymes, low platelet count; PROM, premature rupture of membranes