Moderna’s and Pfizer’s versions of the COVID-19 vaccine were among the iterations assessed in the study. Fauci worried that the COVID-19 vaccine might lead to a miscarriage in the first trimester, according to a text dated on Jan. 25, 2021. (U.S. Senate Committee on Homeland Security and Governmental Affairs)“In the vaccine trials, pregnant women were not allowed but following the EUA, a large number (more than 10,000) pregnant women have been vaccinated. “That’s a strong statement to make and potentially quite damaging to public confidence among pregnant women.” It really is pretty clear that pregnant women should get vaccinated.”