As soon as the COVID-19 vaccine was available, questions about when pregnant women could be vaccinated arose. After all, the risk for severe disease related to COVID-19 is fairly low, but it’s higher for pregnant women than for non-pregnant women in their twenties and thirties. Based on how the Pfizer and Moderna vaccines work, experts believe they will prove to be safe for pregnant women. But we don’t definitively know that these vaccines are safe for the mother and fetus until studies on these women specifically are performed in the coming weeks and months.