Health officials say a study in the New England Journal of Medicine that focused on COVID-19 vaccines and pregnancy should provide reassurance for expectant mothers.

The key finding of the study was that vaccines from Moderna and Pfizer do not appear to pose a serious risk during pregnancy. The study focused on these mRNA vaccines and data on 35,000 pregnant women who got vaccinated.

"No safety concerns were observed for people vaccinated in the third trimester or safety concerns for their babies. As such, the CDC recommends pregnant people receive the COVID-19 vaccine," said Dr. Rochelle Walensky, the director of the Centers for Disease Control and Prevention.

The CDC's smartphone-based surveillance system provided the data on pregnancy outcomes and complications.

Doctors say the findings are significant because if a pregnant woman gets sick with the COVID-19 virus, she's at risk of serious illness and may need hospitalization.

Medical professionals say the vaccines can prevent that.

The most reported side effect from the injection was soreness in the arm from the needle.