COVID-19 Omicron variant infection has minimal impact on maternal and neonatal outcomes: A cross-sectional cohort study

Aim: To explore the impact of the Omicron variant on maternal and neonatal outcomes.Design: Cross-sectional cohort study of women giving live birth in a single hospital in Shanghai in December 2022.Methods: Demographic characteristics, maternal and neonatal outcomes and laboratory testing results were retrieved from medical records. Propensity score matching was used to match COVID-19-positive and -negative women. Differential analysis was used to assess associations between COVID-19 and in-hospital maternal and neonatal outcomes.Results: A total of 1508 women were included, comprising 729 natural births, 741 caesarean sections and 38 forceps deliveries. After 1:1 matching, 310 clients were included for analysis with each 155 in COVID-19-positive and -negative groups. Higher maternal fever was found in all modes of delivery, and higher preterm birth and lower pH value of blood gas of the umbilical artery in the vaginal delivery subgroup (p < 0.05). Other maternal and neonatal outcomes showed no significant difference between COVID-19-positive and -negative clients.