Pregnancy causes various changes in the body that may make a woman vulnerable to harm from the Coronavirus.
Pregnant women can get some protection through vaccination, as recent evidence indicates that the vaccines Moderna and Pfizer are safe to use during pregnancy.
The results were published Thursday in the “Journal of the American Pediatric Medical Association,” which echoed what was reported in smaller studies.
The research included women from 18 countries, including the United States, Central and South America, Europe, Asia and Africa.
The study also included about 700 pregnant women infected with Covid-19 and 1,400 uninfected women.
The research was sponsored by a research fund at the University of Oxford, where the study’s lead authors are working.