Effect of omicron infection on maternal and neonatal delivery outcomes: A retrospective cohort study.

Background: People are very concerned about the adverse effects of Omicron infection on delivery modes, duration of labor, and the postpartum status of pregnant women and neonates.

Methods: 382 pregnant women (Omicron group: 136 cases; non-Omicron group: 246 cases) giving birth in our hospital were collected, demographic characteristics, vaccination, clinical manifestation and medication, delivery outcomes of pregnant women and neonates were recorded. Delivery outcomes were compared between the Omicron and non-Omicron groups, acute infection and non-acute infection groups to explore the relationship between adverse delivery outcomes and Omicron infection.

Concentrations and influencing factors of 17 elements in placenta, cord blood, and maternal blood of women from an e-waste recycling area.

Background: The effects of prenatal element exposure on mothers and fetuses have generated concern. Profiles of trace and toxic elements in biological material are urgently desired, especially for women who reside near e-waste recycling facilities. The aim of this study was to investigate elements concentrations in placenta, cord blood, and maternal blood of women and to evaluate the influencing factors.