A growing number of case studies suggest that covid-19 is linked to a higher rate of preterm births, and the virus may be able to cross the placenta to a fetus
Source:
https://www.newscientist.com/article/mg24632823-400-what-the-latest-research-suggests-about-the-coronavirus-in-pregnancy/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home