Objectives: To assess the incidence of hospital admissions for covid-19 disease in pregnant women, severity of covid-19 disease, and medical treatment provided to pregnant women with moderate to severe covid-19 during the first 10 months of the pandemic.

Design: Individual patient data meta-analysis of population based cohorts in International Obstetric Survey Systems.

Setting: 10 European countries with national or regional surveillance within the International Obstetric Survey Systems (INOSS) collaboration using aligned definitions and case report forms: Belgium, France (regional), Italy, the Netherlands, Denmark, Finland, Iceland, Norway, Sweden (regional), and the UK. The dominant variant of the SARS-CoV-2 virus was the wild-type variant in all countries during the study p